Oh I bet Ken could make this!! The hideaway bed. This is such a great solution for a shared room with limited play space. The Murphy-bed concept would work so well and the hinged ladder lays flat against the bed making it even more compact.
This Guy Created Something AWESOME In His Backyard. Here's How You Can Do It Too.
Designed for Outdoors - Official Blog: DIY Water Blob for Summer Fun with the Kids! Really easy to make Here are the supplies you'll need: A plastic drop cloth (painter's plastic, 10x20 or 10x25) Baking paper Duct tape Either a Hair Straightener or an Iron