DD's always had a good sense of humor. I don't remember how old she was but it was definitely before she was 1 she started laughing socially. As in if all the adults were laughing she's start doing this fake little laugh, it's great! DD has always laughed a lot and she did that pretty short after birth. Her current favorite funny thing to do if to put sunglasses on inside the house while we sing and dance to "I wear my sunglasses at night..". laugh

Both DH and I have pretty good senses of humor. Many people have actually told DH he could be a stand up comedian and for me I normally am more writing orientated with it (as in funny emails, stories, etc.).