Description: While stimulating children's interest in learning and thirst for knowledge, this self-made traffic light can also exercise children's thinking ability through DIY. Characterized by educational and motivational feature, our science and technology kit can help your children recognize the working process of traffic light, and cultivate your children' brain development. It is made of wood and electronic components material. The length of this product is 6.5cm. The total height of the product is 10cm. This product is suitable for early learning. Item Name: DIY Traffic Light Material: Wood, Electronic Components Battery: 2 x AA Batteries (Not Included) Feature: Brain Development, Hand Ability Cultivation, Multifunctional Size Details: Length: 6.5cm/2.56" (Approx.) Height: 10cm/3.94" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of DIY Traffic Light (DIY Required)