<SUBMISSION>
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<TYPE>4
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<PERIOD>20050401
<FILING-DATE>20050404
<DATE-OF-FILING-DATE-CHANGE>20050404
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>BUILD A BEAR WORKSHOP INC
<CIK>0001113809
<ASSIGNED-SIC>5945
<IRS-NUMBER>431883836
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0101
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
<CITY>ST LOUIS
<STATE>MO
<ZIP>63114
<PHONE>314-423-8000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
<CITY>ST LOUIS
<STATE>MO
<ZIP>63114
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Clark/Fox III, L.L.C.
<CIK>0001306309
<STATE-OF-INCORPORATION>MO
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
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<BUSINESS-ADDRESS>
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<CITY>ST. LOUIS
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<ZIP>63114
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</BUSINESS-ADDRESS>
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<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
<CITY>ST. LOUIS
<STATE>MO
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</MAIL-ADDRESS>
</REPORTING-OWNER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>CLARK FOX II LLC
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<BUSINESS-ADDRESS>
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<PHONE>3145933200
</BUSINESS-ADDRESS>
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<OWNER-DATA>
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<BUSINESS-ADDRESS>
<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
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</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
<CITY>ST. LOUIS
<STATE>MO
<ZIP>63114
</MAIL-ADDRESS>
</REPORTING-OWNER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Smart Stuff, Inc.
<CIK>0001306311
<STATE-OF-INCORPORATION>MO
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
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<BUSINESS-ADDRESS>
<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
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<STATE>MO
<ZIP>63114
<PHONE>314-423-8000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>1954 INNERBELT BUSINESS CENTRE DRIVE
<CITY>ST. LOUIS
<STATE>MO
<ZIP>63114
</MAIL-ADDRESS>
</REPORTING-OWNER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Clark Maxine
<CIK>0001306314
</OWNER-DATA>
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<BUSINESS-ADDRESS>
<PHONE>314-423-8000
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<MAIL-ADDRESS>
<STREET1>C/O BUILD-A-BEAR WORKSHOP, INC.
<STREET2>1954 INNERBELT BUSINESS CENTRE DRIVE
<CITY>ST. LOUIS
<STATE>MO
<ZIP>63114
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4_040405ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-04-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001113809</issuerCik>
        <issuerName>BUILD A BEAR WORKSHOP INC</issuerName>
        <issuerTradingSymbol>BBW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001306314</rptOwnerCik>
            <rptOwnerName>Clark Maxine</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
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            <rptOwnerStreet2>1954 INNERBELT BUSINESS CENTRE DRIVE</rptOwnerStreet2>
            <rptOwnerCity>ST. LOUIS</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
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            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
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            <officerTitle>CEBear &amp; Chairman of the Board</officerTitle>
        </reportingOwnerRelationship>
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    <reportingOwner>
        <reportingOwnerId>
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            <rptOwnerName>Smart Stuff, Inc.</rptOwnerName>
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        <reportingOwnerAddress>
            <rptOwnerStreet1>1954 INNERBELT BUSINESS CENTRE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST. LOUIS</rptOwnerCity>
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    <reportingOwner>
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            <rptOwnerCik>0001306310</rptOwnerCik>
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        <reportingOwnerAddress>
            <rptOwnerStreet1>1954 INNERBELT BUSINESS CENTRE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST. LOUIS</rptOwnerCity>
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    <reportingOwner>
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        <reportingOwnerAddress>
            <rptOwnerStreet1>1954 INNERBELT BUSINESS CENTER DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
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    <reportingOwner>
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        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1954 INNERBELT BUSINESS CENTRE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST. LOUIS</rptOwnerCity>
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            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-04-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>274815</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.5</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>549730</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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            </securityTitle>
            <transactionDate>
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            </transactionDate>
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                <transactionCode>F</transactionCode>
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                    <value>72124</value>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeHolding>
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                <sharesOwnedFollowingTransaction>
                    <value>2940364</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Smart Stuff, Inc.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
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                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>395792</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
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                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>77292</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Clark/Fox III, L.L.C.</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.50</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-04-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>274815</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2005-04-03</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>274815</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The options vested with respect to 54,963 shares on April 3, 2002, and 109,926 shares on each of April 3, 2003 and 2004.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Maxine Clark</signatureName>
        <signatureDate>2005-04-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
