Building set includes 2 Peek A Blocks, 35 big building blocks designed to be durable, 1 rolling school bus, 3 slides and 1 launcher All-new way to play: Place your Peek A Blocks animal on a block to activate its peek-a-boo surprise Launch the Peek a Blocks down the slide for a rolling good time 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 thinking and fine motor skills, Manufacturer: Mattel