I ordered it to put together with my boys. I loved it and ended up putting it together myself. The design and the quality of the components are top notch. The only thing you need in addition to the kit is some wax to rub on the axles. I only used one candle. A flywheel is used to provide energy. You spin the flywheel and the whole mechanism spins. I ended up having a nice chat with one of my guys about gears and how gears work. I ordered a tractor and a tram for my boys. I hope I can pull myself together and let them have some fun.
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