Great idea for lego storage! Instead of flat surface, add lego mats. Creative Solutions for Small Space Play: Underbed Play Table with Drawers by Great Little Trading Co. (does not ship to U. but think of the DIY possibilities)
cute little book nook reading center for kid's bedroom or playroom - just frame favorite book covers, hang letters to spell out read, and add low shelves for kids to reach books. would like to use the ikea spice racks that are super cheap for shelving.