During her school year, Lily ran 50 km during her school's jog-a-long program, and she decided we should do a family one over the summer. We designed cards to keep track of our kms and after each lap we get a stamp on our card. Each card is for 10 km. We are on our yellow cards now, the next one will be a different colour. The cards are in a pouch by the front door and always (groan) remind us to go do a lap or two. We did one this evening at Lily's suggestion on the way home from grocery shopping. It's a nice way to all get some exercise together.