Bum prints

After grace finished playing in the sprinklers this afternoon, we were sitting on the back steps while she warmed up and ate a cheeseburger. All of the sudden, she starts pulling down her swimsuit bottoms. "what are you doing?!? Pull up your swimsuit!". Our backyard faces a common area/park. She ignored me. "we don't get naked in the backyard! Pull up your swimsuit!" she ignored me, pulled down her swimsuit and sat on the steps. "look mom, bum prints. Get it, instead of hand prints, it's bum prints!" then pulled up her swimsuit, laughed, and finished her cheeseburger.