Science Experiment Materials Kit Developmental Toy Assembly Teaching Aid Collectibles DIY Toy Description: High Quality: Made of high-quality material, sturdy and playable, can be used for a long time. Can be assembled: Science experiment assembly materials, you need to assemble it yourself. Parent-child interaction: You can accompany your children to do it together to increase the relationship. Cultivate ability: Cultivate and exercise children's scientific awareness and practical ability. Battery powered: You need to bring your own AA batteries (not included). Size chart: 9cm x 7.5cm x 17cm / 3.54in x 2.95in x 6.69in. Package includes: 1 Fiber Optic Lamp Material Kit. Note: 1. This is not a baby toy, keep it away from children to prevent ingestion. 2. Please allow slight errors due to manual measurement and different monitors.