You and your toddler are going to love putting a twist on classic peek-a-boo play with the adorable Peek A Blocks. They can place the bumbling bee on its big building block for a peek-a-boo surprise. Designed for your toddler's little hands, this rolling whale is easy-to-grip and easy-to-stack for endless peek-a-boo fun. Ideal for First Builders, ages 1+ Features: Building toy includes 1 Peek A Blocks and 1 big building block, designed to be durable. Place your Peek A Blocks on the block to activate its peek-a-boo surprise Blocks are compatible with all Peek A Blocks playsets and MEGA BLOKS building toys for endless learning fun Ideal for ages 1+, and endorsed by Fisher-Price, First Builders blocks are the perfect fit for little hands, designed to develop imagination and fine motor skills