By assembling the parts, you can easily create mechanisms also used in real mechanical engineering. With this product, you can create a cam mechanism. When you turn the handle, it moves up and down with a bouncing motion. Changing the cam alters the pattern of the up-and-down movement. Let's compare the movement patterns by switching between the four cams. Because it's a simple white design, children can let their imaginations run wild, coloring 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.