What an awesome idea! This would be great built in a kids walk-in closet! Just take the doors off the closet and utilize the extra space! Keep the kids clothes etc in a wardrobe in front of the closet to make it a secret hideout!
Climbing Wall - IKEA Kura Bed with Climbing Wall: Kids love climbing. This is a bed channels that. With the extra climing wall, this is a bed channels kids liking on climbing.
DIY :: game for kids :: Tape yarn across a hallway for a "laser obstacle course".-----except for I think this would be an awesome thing to do in a hallway!