My 13 yr old son was inspired by a recipe in his book “The Blender Way to Better Cooking”. Not having all the ingredients he improvised like a pro.
His recipe: Ginger Ale Apple-Lemon Slushy
Serves 3 large glasses. We squeezed it into 5 smaller glasses.
Place into your blender the following

2 cups of lightly or unsweetened apple [...]