To start out i will list the materials you need.
to start tape both ends of the box so that you cannot open it. Any tape will do.
Next get a knife and cut a small hole in the box.
Next tape a magnet to the top of the small door.
now get a piece of wood or plastic and-tape another magnet to that. Tape it to the box hole.
now you can slide in Quarters change or any small thing in the sides. Thanks hope you like it. ( $ ). Please follow and favorite.