9. Stackable Crate Tower
Instead of one big box, build three or four open crates that stack into a tower and can be pulled apart when the room needs to change. Each crate holds a category — one for blocks, one for cars, one for art supplies — and the tower can be rearranged, moved to a closet, or split between siblings.
Make each crate from 1×10 pine with a plywood base, sized so the top one nests into the one below. Add a cutout handle on both short sides using a jigsaw and a drilled starter hole. Paint each crate a different shade from the same palette so the tower looks deliberate, not random.
Time: two hours per crate. Difficulty: beginner-friendly. Cost: moderate, spread across several weekends if you build one at a time.
This approach is forgiving. If you only get one crate finished this weekend, you still have a working toy box. The rest can follow whenever you have an afternoon free. It also grows with a child: the same crates that hold blocks at three can hold school papers at eight and sports gear at twelve.