Treasure boxes can be made from almost any kind of box, such as shoe boxes, tea boxes or anything with a lid. The three dimensional quality of a box gives kids a great surface for experimenting with collage.  A child might be inspired to collect treasures to keep in it once it is done. This collection can consist of all kinds of things that a child might find interesting--pebbles, bottle caps, stamps, trinkets, beads, just to name a few.