You can use lots of things to make marks as well as your normal writing tools such as crayon, chalks, pencils, pens and paint.
How about making marks in sand with your finger or a stick? Using water and paint brushes to make shapes and letters outside on the ground.
Using sticks and stones to form letters, numbers or shapes. As well as pictures.
Using empty cardboard tubes create a ball run. You can tape them to the wall, a door or on the side of a box.