Little Sister to Many Brothers

As I am working on the computer, I can hear my darling little girl (almost 22 months) in her room.  She is supposed to be napping, but she is not.  What do you think a sweet, angelic baby girl would be doing in her bed when she is supposed to be napping?  Talking to herself?  Singing to herself?  Playing with her dolls?  These are some of her usual activities.  Weird noises were coming from her room and when I stopped to listen more closely, I realized that my sweetheart little girl was FAKE BURPING and then saying excuse me, then laughing hysterically.  Ummmmmm....at least she said excuse me, right?