So, how do you go about changing tantrum central into Mr. Roger's Neighborhood? Dr. Marcie suggests using the playpen when it isn't necessary — and not just when you have to get dinner on the table or take that important call. "Sit on the outside and read them a book," she says. "Walk away for a minute, then come back, so they realize, oh, it's just a moment that you disappear." Build it up as a fun space, singing her songs and talking to her. When it comes to transforming a place, "it's not about the stuff, but about the level of engagement," says Dr. Marcie.