Turn a simple toy motor to become a generator which converts hand motion to electric energy and powers a light bulb. NO battery, no pollution, just amazement. The generator could be used as an awesome emergency torch (light).
4M Kidz Labs Human Organs | Toys | Buy online in South Africa from Loot.co.za
Kidz Labs Green Science Enviro Battery Science Kit | R351.60 | Toys | PriceCheck SA