This idea, we got from the Wilson Education Resource Center, all credit is given to them. It was really good and so I am creating a how to for it.
Put two holes in the cup on other side and tie string.
Take your two paper towel rolls and punch two holes in each on other side of the roll.
Put the dowel, stick, or skewer through the holes of one roll then into the ribbon spool and then into the other roll.
Affix the other end of your “bucket” string to the ribbon spool with tape and roll up.
Tada you now have a simple pulley.