Push green rod to raise the cards in a stair step manner.

Key factor: pink combined cams that are driven via rack-pinion drive.

The box bottom is detachable to ease the assembly.

Red spring brings the mechanism to initial position.

This video was made on request of a YouTube viewer.

Device for positioning the green rod (similar to the one used for ballpoint pens) is not shown. Its reference video:

Retractable pen mechanism