Do you remember when the world was so small and simple? While laying in the crib, babies can stimulate so many of their senses. Hearing the sounds of a mobile, watching a mobile or looking at the toys in the crib, reaching for an object or just touching a toy in the crib all contribute to the baby’s development. All five senses develop as the baby plays in the crib. Babies can be stimulated, soothed, entertained and cognitively developed with some very simple baby toys.