Complex sentence: Bing and Bong design gadgets to discover the properties of springs, wheels, levers, pulleys, balance, friction, gears and structures.The planet is a large brass sphere, with four tethered satellites: two cubes and two spheres.
Split into simpler sentences: Bing and Bong design gadgets to discover the properties of springs, wheels, levers, pulleys, balance, friction, gears and structures. A large brass sphere, with four tethered satellites: two cubes and two spheres.