Surprise! It's playtime, and all of your baby's monster friends are here for pop-up fun! As little ones slide, push, toggle and turn the knobs in front of each numbered door, the four tiny monsters will pop-up for a quick hello. It's a surprisingly good workout for fine motor skills and a whole lot of exciting fun! Where development comes into play Sensory: Silly monster faces, bright colors and fun sounds keep your baby's senses excited and engaged. Fine Motor: Your baby is strengthening dexterity with every slide, push, toggle or turn! Thinking Skills: As babies discover all the ways to make the monsters pop up, they're introduced to cause and effect.