ShowMama my cousin Jim and I did the same thing. We had his toy tractors and dump trucks big Tonka toys and we played in the dirt for hours and hours. My grandpa's farm had a lot of sand mixed in with the dirt in the long sweeping driveway and we played there alot and in the Chicken house as it had straw mixed in there too with the sand. We made long roads in the dirt and carted tons of the stuff from one place to another.
We also added water and made lots of mud cakes and mud pies and used grass as ingredients.