STEM Model Building Kit 3D Wooden Track Ball Puzzle DIY Assemble Mechanical Gear Engineering Toys

Recommend Age: 7-12y Recommend Age: 12+y Recommend Age: 18+ Quantity of Items in Set: 50 Theme: Rollercoaster Model Number: model building kits m06 Gender: Unisex Type: diy Marble Run Ball kit Features 1: Steam education kits Toys Features 2: science experiment Colour:Wood color Material:Wooden Package Contents: 1 set x DIY STEM Toys(Without 2 AA batteries) 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.