First, I buried about a dozen items of various sizes to represent our civilization in the sandbox. Next, I divided the sandbox into four quadrants so she could write down what she found in each section like a real archaeologist.
Then, the digging got underway.
She found a toy car first.
Then some money.
By then, our neighbor Justine came over to help. I think part of the incentive was I told them they could keep any money they found in the box. :-)
Justine found some coins.
Then, Red's friend Siera came over to help too.
Here's what they found (not the snow shovel---just the stuff in it):
Justine cataloged it all for Red.
They found everything I buried except an eraser shaped like a piece of toast. The girls said they'd find it later. Then, they ran to get cooled off in the hose!
That toast eraser will probably be in the box now forever and become a real artifact.