What happens when muscle power meets a spiral spring? It becomes mechanical. Whether it's a timer clock, a racing car, or a robot - here, children aged 8 to 12 test different models and discover one of the oldest sciences in the world. A drive that operates completely emission-free. This way, children learn playfully that there are various ways to ensure mobility. The instructions guide them step by step through all the setups and experiments, providing insights into the fundamentals of physics and mechanics. With the Kosmos experiment kit, model building turns into a fantastic research adventure. Clever.