This happened a couple of weeks ago, but I'm posting it now. This actually was his very first ever laugh. I happened to catch it on video! I think it's hilarious, but I know I have a slight bias.
The quality is a little poor, sorry. Laugh is at 25 seconds in.
https://www.youtube.com/watch?v=9tUXGjUza8o
Edit: title of post
Re: My Baby's First Laugh! (LIP to video)
BFP #1 9/7/10, EDD 5/14/11, Violet born 5/27/11.
BFP #2 4/9/12, EDD 12/16/12, M/C Rory 4/24/12.
BFP #3 10/6/12, EDD 6/16/12., Matilda born 6/17/13.
LOVE IT!!!