Although a colorful crib mobile and her first taste of applesauce may bring a smile to your baby's face, what makes your baby happiest is much simpler: you. (babycenter.com)
We're taught to make our baby happy all the time. (katesurfs.com)
One exception that might make your baby happier in the crib is a projection night light. (get-your-baby-to-sleep.com)