The Fisher-Price Stack & Discover Sensory Blocks keep your baby's little hands busy with exciting sensory play. Each of the three blocks in this set features numbers, friendly animals, bright colors, cool textures, and surprising activities for your baby to flip, turn, rattle, squish, crinkle and slide! Little explorers can stack up hours of skill-building play with this super-fun toy set. Where development comes into play. Fine Motor Skills: Grasping and stacking the blocks, plus exploring all the hands-on activities, helps strengthen your baby's dexterity and hand-eye coordination. Sensory: A variety of colors, rattle sounds, and textures engage your baby's developing visual, auditory, and tactile senses as they play with the blocks. Curiosity & Discovery: Your baby is introduced to the fun of cause & effect as they discover how to pop up the foxes, slide the door for a surprise, and shake the blocks for rattle sounds.