Want proof? This kid thinks his dad is just hysterical.

This baby thinks its funny that his dad has the hiccups.

Baby in a swing laughs hysterically at someone playing with a toy.

To me, this is one of the best of the laughing baby videos I have seen. Every time his dad makes that silly noise the kid just busts a gut.

He is laughing so hard he can't even keep himself upright.

Baby laughing at mom while bounceing a ball!