Purchase a wooden box that serves your specific purpose. Perhaps it is a jewelry box or maybe a box to store larger items.
Buy the hardware for the box. You can find supplies online, including hardware, at Scorch's pyrography website.
Search for a pyrography craft kit, which are available at most craft stores. Select the kit that decorates as much as you want to learn how to do. Kits come complete with a branding tool to decorate on leather as well as wood.
Outline the chosen image onto the box with the branding tool. Lightly go over the outline with the color of your choice, using colorful ink or paint applied with a fine brush.
Allow the paint to dry and cover with a clear finish.