This item is a DIY teaching prop, adopting sturdy material, safe to use, simple to assemble, which can exercise students hands-on ability. A good and practical small science experiment prop for students, which can help them improve science logic thinking ability. Features -Color:Multi -Material:Wood -Size:20.00X20.00X10.00cm/7.86X7.86X3.93in -This set of educational prop is suitable for conservation of energy teaching, and professional and practical. -The diy assembly kit is good for school teaching tool, learning display, and collectibles. -The science aid can improve students' hand-on ability and thinking ability. A good educational gift to friends. -To the understanding of conservation of energy, good for student learning, practical and educational. -Our science toys include all the tools and materials necessary to complete this mechanical structure. Package list: 1 × set of energy conservation science model kit