I have ridiculously bratty girls in current generation (only have one family running at the moment). I think the older one is the instigator because as soon as she does something, the younger one will literally stop what she is doing and go running to do the same exact thing. They're obsession is jumping on the bed. I've tried scolding them, I've tried bribing them with things to occupy their time like the bubble machine. But noooooo. They just have to go jump on the bed. The only other activity they seem to enjoy doing on their own accord is reading. They'll both go grab books and read like perfect little angels...before finishing up and running back to the bed.