Rope Untangling Puzzle

Twenty minutes without a screen.

A classic rope-and-ring puzzle: the rope looks permanently knotted through the frame, and it isn't. There's exactly one way out, and finding it takes most people somewhere between ten minutes and an evening.

Better than expected for adults, too — it's the kind of thing that sits on a coffee table and gets picked up by everyone who walks past. No batteries, no app, no sound.

Why it works

• One clear goal, no instructions to read
• Genuinely difficult the first time, satisfying every time after
• Travels well — car journeys, flights, waiting rooms
• Solvable and re-tanglable, so it doesn't get thrown away after one go