Feature 1HAND EYE COORDINATION: DIY gravity trolley model can improve children's hand eye coordination and improve their fine motor skills. 2PREVENT ADDICTION GAME: Gravity trolley model to cultivate children's interest, to prevent addiction to the game, exercise thinking intelligence. 3EASY TO ASSEMBLE: DIY gravity trolley model is both a toy and a teaching tool, easy to assemble and feel the fun of doing it. 4PARENT CHILD RELATIONSHIP: Gravity trolley model can practice children's communication skills and spend quality time with family and friends. 5PLASTIC MATERIAL: Kids gravity trolley toys made of plastic material, wear resistant and durable, not easy to damage, can be used for a long time.Item Type:GravitationalCarDIYToyMaterial: Plastic .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 x KT Board11 x Orange Accessories4 x Iron Bar4 x Wheel4 x White Accessories1 x Nut1 x Rope