Barbara's tip: "A roof not only provides protection from rain and sun, but it also defines the upper play space better. I've found that as kids get older, they want a place to hang out that is higher off the ground."
Barbara's tip: "Kids love playhouses with doors and shutters that they can open and close a million times. We use sturdy hinges and leave a half-inch gap around the openings so little ones' fingers don't get pinched."
Barbara's tip: "When designing a treehouse, I prefer to not have the tree limbs go through the roof because it makes harder to waterproof. So when starting a project, I look for space for the roof first."