Toddlers love to sing, sort and build. This versatile toy from Fisher-Price lets them do all three. Clear shell is filled with 10 brightly colored building blocks. Kids can use the snail's body as a base for building. They can also sort the different block shapes, and fit them through corresponding holes in the snail's shell. When the snail rocks, music plays. Requires 2 LR44 button cell batteries (not included).