Imagine when you put your baby to sleep, your baby doesn't cry. Your baby happily plays in his or her crib, looks at the mobile, or babbles, but isn't sleeping. Or, your toddler happily chats in his bed for an hour every night before going to sleep. You're lucky, right? This is the ideal baby sleep situation and you have nothing to worry about, right? Wrong. Turns out that downtime in your baby's crib - time in which she plays and entertains herself - might actually be detrimental to sleep.