Magic Drawer

This object is a drawer with a double bottom to hide what is inserted inside. It is a toy for little magicians.
The magician has to move the drawer back wall on one side. Doing so the internal shell moves together with the drawer. The magician then open the drawer and put an object inside. The magician close the drawer and move the drawer back wall on the opposite direction locking the internal shell. At this point he/she just have to say some magic word and open again the drawer. This tim