Have you wondered what is inside of that product and how it works? Select a product that can be taken apart (toy, pepper grinder, remote control, mouse etc). Make a guess before tearing down. Sketch out and list what you think is inside of it. Tear down the product carefully. Otherwise it may not work after reassembly. Compare your initial guess with what you find out. Be ready to be surprised! You can take this further by trying to spot clues about how these parts were made and from which materials.