Yeah—that idea is basically upcycling old frames into a rigid structure, and it can work really well.
When you “tie 4 frames together at the corners,” you’re turning flat picture frames into a box-like skeleton. Depending on how you connect them, it can become a few different useful things:
- Mini greenhouse / plant display – add plastic or glass panels and you get a simple cold frame for plants.
- Shadow box / display cube – great for collectibles, shoes, crafts, etc.
- Open storage crate – just leave it open for towels, books, or décor.
- Lightweight table base – with a solid top panel added.
The key detail people miss is stability: frames alone are weak in torsion, so it only really works if you:
- Reinforce corners (wood brackets, screws, or strong adhesive—not just string)
- Make sure all 4 frames are the same size
- Add a back panel or top/bottom panel if you want it rigid
If you want, tell me what you’re trying to build (greenhouse, shelf, table, etc.), and I can sketch a simple step-by-step version that actually holds up.