We recently tried a paint recipe that called for 1 cup flour, 1 cup salt, and 1 cup flour. Needless to say it just wasn't right. So I changed it!
1 cup salt
1 cup flour
2 cups water
food coloring of your choice
Its very gritty so its good for sensory finger painting with the little ones. Of course its safe and edible. Very salty but edible. And when it dries the salt gleams in the light. Its really cool!