Automatic Traffic Light This is an automatic traffic light, he is by the program control work, the main components by the program control board LED light composition. When the automatic traffic light is working, it sends a signal to the program master board When the program master control board receives the signal, it will automatically follow the green light. Yellow light, red light. Size: 12.9 x 14.2 x 8.2 cm Color: Wood Material: metal, plastic The 2 AA batteries are not included. Included assembly instructions with step-by-step photos This product is not ready, you will manufacture it. There are all the materials needed to make your construction. Ages 12+