Your legs might hurt but your baby will just want it more and continue laughing. Tickling: Whether it’s on their feet, stomach, or armpits, you can tickle babies to make them laugh.

This mom couldn't stop laughing during her ultrasound and the images from the monitor are incredible... and more hilarious than you imagine.

Our brains see laughing in a social context as conversation, McGettigan explains, “where we try to infer the other person’s emotional and mental state.” It’s no secret that babies cry a ...