I have a fabulous, very smiley (people often comment), chilled 13 week old DS. He had pyloric stenosis so didn't thrive for 5 weeks, and it still playing catch up a little - that said, he's on target with all of his developmental stuff. Except he hasn't laughed and I had imagined he would by now...or am I being a nightmare, neurotic mum? He smiles LOADS at me, especially when I'm being silly, but no laughs. Lots of cooing and babbling though.
I am just really looking forward to the laughter...any thoughts about when this might kick in?