Here's what you'll need:
Filler - this is where you can be creative. I used rice because I had it. You could use LOTS of things like pebbles, sand, small dry noodles, dried beans, unpopped popcorn, lentils
Foil, parchment, or other paper
Kitchen gadgets to play with - funnel, whisk, spoons, forks, small cups, big cups, tongs, spatulas
My box was 8 inches wide, 16 inches long, and 6 inches deep. The size depends on what you have and how much filler you have. Line the bottom of the box with parchment paper and tape off the edges. This will help your filler to not fall through the cracks in the bottom of the box.
Add your filler. I used rice because I had a mouse chew through the bag in my pantry. I did want to eat it but I didn't want to throw it away either! If you live in the big city I would go to a store that sells items in bulk bins and see what's on sale! I used 4 pounds of rice in my box.
Let the kiddos have at it with the other utensils and things that you have around!
I buried the money in the rice and they had to find it! My 4 year-old had to find the money with her utensils and the 2 year old could find them how ever he liked. He chose his hands.
After a few rounds of "treasure" hunting we needed to move on again. This time we went for some imagination play. I let the kids pick out some animals and things from the toy box to bring into the rice box. Before I knew it we were having a swimming birthday party for Care Bear! The rice was the water and everyone had to sing and tell Care Bear what they were going to give her for her birthday.
No pool is complete without a water slide!