when did your baby laugh?

My son is 3 1/2 months old and I have yet to hear him laugh. he smiles ALL the time, but I cannot get a laugh out him him no matter what i do..I'm so ready to hear it!

Try putting him infront of a mirror. My LO was 3 1/2 months and thought his reflection was hilarious.

My babies were between 3 months and 5 months. have you tryed playing peek a boo? my daughter use to think that was funny around 3 and half months.

My daughter is 4 months and has just started proper laughs. She only laughs at certain things (usually me making funny noises) and only when she's tired!

Mine hasn't started yet...she's two months and full of smiles, but she hasn't figured out laughing yet. She just smiles.

my daughter is 4 months & 1 week old.. she just started laughing a week ago and only does it when I do peek a boo.. but I literally have to hide behind the wall, jump out & yell peek a boo! or boo! lol  

well, i'm going to try peek a boo! he isn't interested in the mirror yet!

2&1/2 months..he is 3 months now

My son will be 4 mons on the 11th but he's been laughing probably the last month he loves to be tickled and thinks that when I clap his hands that is the funniest thing he's ever seen oh and when I sing "on top of spaghetti" lol don't know if the song is funny or my singing (probably my singing) but he laughs everytime!