Contact Lego. They'll send you the missing piece.
>Hi everybody,
>
>For my son's 9th birtday my husband bought him a Ninja-GO Lego (that's what he asked). It looks like at least one detail is missing from the set.
>
>So, what should we do in such situation?
>
>Thanks.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer