A mousetrap car is a simple example of the conversion of potential into kinetic energy.
If a couple of wood waste, drinking tube, beer coasters or old CD's you can use them for construction.
If you have a kit like LEGO, fischertechnik, Eitech etc. you can refer to it.
Which system is used to matter. The function is the same everywhere and build the fun.
If you focus on a great speed and range should be small weight and tire width.

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Bio: I live in Braunschweig, Germany with 3 children. We love to build and experiment.
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