Engenius Contraption is an award-winning flat-pack marble run that you assemble yourself. This simply brilliant marble run is made of plywood, with all the parts coming laser-cut in sheets - just follow the simple set of pictures to push-fit them together. With a build time of 1-2 hours, assemble the spral run and zig-zag before adding the electric motor. The marbles are raised to the top of the lift, descending down the spiral then down the zig-zag track...then back up to the spiral to start again, in perpetual motion. Winner of Gift of the Year 2019, fun and extremely satisfying to build and mesmerising to watch.