The carton is cut in the middle, so that there are paper edges on three sides.

Leave one centimeter on each side, just like cutting. If there is no paper edge on one side, cut a piece of paper one centimeter wide and as long as the other side.

Fold the four sides and stick them with tape.

Cut three pieces, one centimeter wide and two centimeters shorter than the pasted box.

Stick three strips vertically on it, one on the right, one on the left and one on the right.

Put a bead on one end, shake it from side to side and let the column run to the other end. The carton game machine is ready, isn't it simple?

I hope it's helpful for you to make a mini game machine. Good luck!