I made this marble run quite a few years ago from wire coat hangers, old printing plates and three baked beans tins. A marble rolls downwards along wire tracks, passing through 2 baked beans tins, before triggering a large crane arm that takes the marble right back to where it came from. There are also a few special effects along the way – a counter weight that turns a windmill, and a release catch that flips over one of the cans. On one hand it’s a creative example of upcycling, on the other hand it’s totally pointless!
I spent 6 weeks bending it into shape with pliers, I’ve still got the blisters – definitely something you only make once in your lifetime!
If you fancy creating your own marble run (and one that doesn’t require so much painstaking wire bending) check out my marble run science project. I have even provided some downloable instructions to help get you going.