By assembling the parts, you can easily create mechanisms also used in real mechanical engineering. With this product, you can build an oscillating slider-crank mechanism. When you turn the handle, it swings and moves up and down. Because it's a simple white design, children can let their imaginations run wild, painting it, attaching parts, and creating their own original designs based on the movement. They will become interested in various moving machines around them and develop an interest in manufacturing.