Description: Novelty appearance and vivid color designs will easily attract children's attention while having fun. It can stimulate children's interest in learning and curiosity through DIY small production, exercise children's thinking ability, and let children understand abstract knowledge through disassembly and assembly. With educational feature, this model toy can help children develop their interest in science and their intellectual ability, innovative thinking, hands-on ability. Made of plastic and electronic component material, it is eco-friendly and safe. The length of product is 16cm and the width is 10.5cm. This product is a wonderful teaching equipment for student science and technology education. Item Name: Big Dipper Model Material: Plastic,Electronic Component Battery: 2 x AA Batteries (Not Included) Features: Safe, Reliable, Creative Suitable Age: Over 5 Years Old Reminder: The product is a DIY toy, the color changes with the color of the parts. Size Details: 16cm x 10.5cm/6.3" x 4.13" (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. Big Dipper Description: Big dipper is composed of seven stars, which includes Tianshu, Tianxuan, Tianji, Tianquan, Yuheng, Kaiyang, and Yaoguang. The ancient Han people connected the seven stars and imagined it as an ancient bucket shape for scooping wine. Package Includes: 1 Set of Big Dipper Model (Including Disc, Pin, Lampshade Holder, Diode, Circle, Seven-star Picture, Lampshade, Diode Plug, Connector, Wiring Sleeve, Half Dome Cover, Base, Battery Box, Section Post)