Building blocks are a multi-color 12 piece set. The set is not only an amazing toy for baby but also great for older kids too. The set contains 12 interlocking shapes on top great for cognitive skill building. The blocks are a teether, bath toy, as well as contains 0-9 in numbers, +- and = for math time too. This non toxic, BPA free silicone teethers will satisfy all of your teething babes needs as well as a great multi children playtime fun.