Ivar cabinets from IKEA in three different ways - domesticated Units
Ikea Trofast storage system - possible Lego storage solution
the boo and the boy: kids' desks
Wall mounted toy storage would allow for easier cleaning underneath.
DIY Under the Bed Lego Storage 15 LEGO Storage. I have a under the bed drawer in M's room. I was thinking of adding lego plates and storage around the edge.