The Family Handyman has free online plans for a sturdy under the bed storage box that will help keep down the clutter. It is a fairly straightforward project, with the most difficult part being cutting the plywood, which can be a bit tricky for the uninitiated. Check out these cutting tips which will help you get cutting square and safe.
The box rolls out easily on four casters and can be customized to fit your area. Be sure to use paint-grade interior plywood if you plan to paint it. All in all, a nice project that older children can take part in. Getting them to use the boxes is up to you.
(Images by The Family Handyman)