Silly Seven

Is there something about turning seven that makes an otherwise perfectly normal child turn ridiculously silly?The handwriting at the bottom says "So funny! I mean it!!! --Mom" (Written as if I had commented on her note.)

Molly, of course, was the ring-leader here. They were pretending to be surgeonts. Yes. That 't' was not a misspelling on my part, it was a mispronunciation on theirs. Thankfully, these were clean underwear.