As your baby's brain develops, he'll begin to form a better understanding of the shapes and sizes around him. From a round ball in his toy bin to a square board book on his growing shelf to a big, fluffy dog, your baby will begin to recognize both the size and shape of objects he sees every day. You can further his understanding of the space around him with the help of these colorful titles full of shape recognition, the difference between big and small, and interactive activities to encourage learning.