I have written in the past about our OCD Nut (Claire) and Mini-Godzilla (Aerin). This character difference not only applies to how my girls clean/mess up their toys, but also extends to how they play and conduct themselves. Aerin is a daredevil while Claire still remains one of the most cautious kids I know. Aerin likes to play outside — and doesn't mind getting dirty! — while Claire prefers indoor activities. (Even then, she is known to quit an activity if she sees that she is getting dirty, and requests to go wash her hands or to take a bath.) Claire loves reading and being read to, while Aerin prefers to flip through books at her own pace, often quickly. And...