The 72-centimetre-tall Theo Klein toy traffic light introduces children to traffic rules in a playful way. Equipped with real red, yellow, and green light phases, the toy traffic light can be controlled either manually or automatically. The stable base can be filled with water or sand for extra stability. This makes the toy traffic light ideal for indoor and outdoor use, for example when riding a ride-on car or tricycle. The battery-operated traffic light requires four AA batteries, which are available separately.