Instruct: Classify Amazon reviews into positive or negative sentiment
Query: fun sand toys but be warned there aren't castle building pieces

I bought these toys for my neice and nephew before a trip to the beach (they are 4 and 1). They had a good time with the toys and they held up through a week of hard play. But we were disapointed that there weren't pieces to build a castle in the set, so we need up buying a second one to supplement.