This is an old daycare favorite of mine. Put painters plastic drop cloths on the picnic table outside or in your kitchen if you are brave. Throw the coffee grounds (damp right from your coffee pot on the table). Add some flour. Mix until it looks like dirt. Let the children play with dinosaurs or plastic animals in the dirt.
The aroma is great especially when you have flavored coffee grounds.
I would tell my neighbors the day before to save their grounds the next morning and they would bring them over to me so that we had a pile of dirt to play with.
Recipe from Homeschoolforms.com, Site Maintained by Donna Young, of DonnaYoung.org