DD had her first giggle at exactly 3 months but then made us wait almost 2 more weeks before doing it again. Now I can get her to giggle a couple of times a day (I work my ass off to make her laugh because I love it so much). What do your LOs smile and laugh at? She smiles at our smiles and coos when I sing, but to get her to laugh I have to play with her feet and give her little tickles on her belly (but don't worry, I'm not torturing her like my mother fears and reminds me, "I never tickled you!!"). She also came close to laughing when I was blowing her raspberries.

Re: Smiles and Giggles
Still, really looking forward to some conscious giggles soon!