so I began to wonder- how could I make this myself.
::things you need::
find a bowl, or container (that is easily unmoldable)
a fine sand, some Elmer's glue, and little treasures (jewels, rocks, or just some beads or buttons)
::thing to do::
mix the sand and glue until it is a paste-like consistency, press into the bowl, take a few "treasures" and stuff into the center and sides of the sand- and let dry.... for a few days ( or if the weather is chilly and wet- a week!) To dig and sweep you can use old paint brushed and a chopstick (or wooden cuticle shaper).
Have a diggin' fun time.