three-ball instrument sun, earth and moon running instrument earth, moon, solar system planet demonstration student popular science teaching aids 三球仪 日地月运行仪 地球月球太阳系星球演示 学生科普教学教具

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The three-ball instrument, a daily Earth-Moon-Sun motion device, accurately demonstrates the movement of the Earth, Moon, and solar system.

Student educational tools for science education, helping them understand astronomical knowledge intuitively.

Address abstract and difficult pain points to stimulate curiosity.

Brand certification, safe materials, popular in e-commerce.

Let children fall in love with science—parents can choose with confidence.