"This age is very social, and babies begin moving in ... or quick chuckles when they're 4 months old, and true out-loud laughing will likely come closer to 6 months. Here are some fun ways to ...
What to Expect on MSN1mon
When Do Babies Start Laughing?
[6]#6 When you do hear your baby laughing, try to look excited to encourage ... exploration of sound and vocalization. If your 3-month-old makes a lot of joyful noise — squealing, chirping ...