The opposite of clean. That is what is fun to most kids. Mine included. And today Zoey & Pazely played in it. Dirt, that is. All afternoon & into the evening. "Until the streetlights came on."---so to speak. And though Zoey looks somewhat miserable in that photo---she was not. She was giddy before I took the picture, & squealing after I took it. I love that dirty messy face.
A close relative to dirt is sand.
If you want to see a REALLY cool picture of grains of sand, click HERE.
Everytime I look at that photo, I keep thinking about how much fun God must have had when he created this world.