I started with my bb before she was born, more of experimenting though.
I played music & tapped my tummy, after 3 days, when the music was on, she would tapped back !
Later on, as she kicked me alot, I would tickled her feet & guess what, after few days, she got it &
tickled me as pay-back !
When she was a new-born, we would blow at her tummy for fun, later at 3 months old,
she would blow hard at my thigh or her dad's bare shoulders...
Started swimming at 7 m/o & could now spin around just with a neck float.
Education aside, even as she learned her share;
now at 16 months, she will get every expressions from us & displayed to everyone after a while
Talkin about imitation !!