What age did your baby laugh out loud?

Kel

My daughter just turned 4 months and still hasn't laughed out loud. When she's excited or amused she just spits on me. You know gow people go "Psshh" when amused?? Like that with tons of slobber...

Just out of curiosity, what age did your babies start giggling?

Also, let me see your giggle pictures! Here is my Gremlin, masking disappointment that I was too far away to spit on....