When your kids aren't quite old enough to build a tree fort of their own high up in the branches outside, now you can give them a fun indoor alternative with this cool new Big Tree Fort Playhouse. This massive cardboard hideaway is a whimsical hollow tree that stands seven feet tall and includes a door and windows built into its mighty trunk. It's plenty big enough for several kids to play in and is constructed of sturdy cardboard that easily assembles using a slotted design. Check out this VIDEO to see it in action. Hmm, now I wish I had one of these in my office just to go hide away in.