this website has alot storage ideas
Use as a bench/toy storage in playroom
Two tall bookshelves on their sides make benches with built-in storage underneath. Would be great for the playroom! by deborah
Kids Playroom With Built In Benches And Storage - make the benches deeper and they could be used at end to end guest beds.
Playroom Built-in Storage and Homework Center
Google Image Result for http://img.diynetwork.com/DIY/2010/08/03/DMON105_White-Built-In-TV-Cabinet_s4x3_lg.jpg
Built in entertainment center to maximize storage space.
built-in TV cabinets
Built In TV Cabinet Design, Pictures, Remodel, Decor and Ideas - page 6