The Fisher-Price Stack Explore Blocks is full of stacking, nesting, and sensory fun for your baby to discover. Each 5-sided block features bright colors, interesting textures, cute characters, numbers, and familiar first objects. Baby can stack the blocks, nest them one-inside-another, or place them side-by-side to build a colorful scene! Set of 5 baby blocks to stack and nest from big to little Numbers, colors, characters, objects and textures for baby to discover on each block Stacking play helps baby develop fine motor skills and hand-eye coordination Encourages thinking and problem solving as baby figures out how to stack and nest the blocks For babies ages 6 months and older