Sounds like they're twins. It's impossible to keep her calm unless you completely wear her out. And then she'll get bored with a toy or the way you're playing with it... and before you know it, YOU'RE dancing on the bed with four toys dangling, trying to get her to do flips and burn off some energy. The other day I shut us both up in the bathroom and tried to get her to climb the walls. I'm not kidding.