Where do kids come up with things

Some days I really wonder about my kids. Last week Katie came out of her room wearing just her underwear. When I asked her why, totally seriously, she said that is how you be a duck. So she showed me. First you put your arms through the top of your underwear and out the legs holes. Then you bend over and run around flapping your arms and quacking. I had no idea that is how ducks came about. Then yesterday anytime I would leave Kassi in a room by herself or she would play by herself, she would come find me totally naked except with underwear on her head. I don't know how it is happening, but Marc or perhaps Uncle Colin shines through more and more everyday. ;-)