Simple stack of multiple fabric-covered foam pads. makes a cushy "sofa" in the playroom, and can be pulled apart for multiple sleepover guests, movie night pillows, or tumbling games, etc. (they have fabric covered foam mattresses at Jysk)
How to DIY your own platform storage bed using only Ikea Furniture. Ikea’s storage beds lend a sophisticated and stylish touch to storing shoes and clothing under your bed. For more bedroom organizing ideas, DIY and Ikea hacks go to Domino.