With play, how you do it is more important than when you do it. Babies learn from repetition, so it's useful to do the same activities in the same order. This will make play more fun and educational for your baby. For example, when you want to introduce a new book, begin with a familiar one. This way, your baby will be more receptive to the new book. And don't skip any songs that are in your regular routine, even if you think your baby is ready to move to a new song. Sing a familiar song first, and then sing the new one.
It's fine to initiate play whenever your baby seems to be in the mood, but the ideal times are usually right after breakfast and in the middle of the afternoon, when your baby is fed and well rested. Play sessions should last from ten to twenty minutes. If your baby seems to become uninterested or is looking away from you, it's time to stop. Some people find it helpful to begin with more stimulating activities such as playing with toys that make sounds or light up. After that, start leaning toward quieter play, such as reading, so that the baby realizes that play time is almost over. Some moms use a short baby video to signal the end of play time. This can be a good way to help the baby wind down.