The Nest & Build Tree Stacker™ by VTech® is a stacking toy and more! Stack or nest the ten brightly colored triangle pieces or snap them together to create five small blocks. When your little builder places the cute interactive cat on top of a piece they will learn colors, numbers and objects. The cat will also ask your child questions to encourage interaction. Press the triangle button on the cat’s tummy and it will play four sing-along songs, fifteen melodies and tons of playful sounds and phrases.