DIY Vintage Milk Crate Turned into Unique Ottoman Tutorial -- could use the plain wooden crates found at a craft store, plus thick or heavyweight fabric, foam, plywood. Could also add hinges to make the top open for storage inside!
Crate Storage: Wooden crate converted into a portable side table with storage - love this creative idea. Easy to make: Turn crate sideways, add a couple of internal dividers & screw 4 castors on the base. wheels for me)