>I swear, my 1 year old daughter has invented two jokes. The first one is that she will offer to hand me something, then when I reach for it she will pull it away and then giggle herself silly. The 2nd joke is that she will point to something that I can't see and say "Dat?", meaning "What is that?" when I turn my head to look, there will be nothing there and she will giggle so hard.

Invented? Oh, pleeeeze. I've been using those for years. ;)

Seriously, it's great when their imaginations start to interact with other people around them, isn't it?