What is your biggest hit for outdoor playtime (besides play equipment)?

mine really like painting my car
some obsess over the water table where others could care less.
they don't care about the sandbox, refuse to play on the playground equipment or ride on toys and trikes. One wants to craft everything but needs a constant activity provided and how to do it. I like to get dirty. I have a germ-a-phobe kid, I swear. Nothing gets use unless I direct it