Another method was used at a walk I participated in that required only 5 laps (each lap was 1 mile). They gave each walker a rubber band every time a lap was completed. The walker put the rubber band around his/her wrist as a reminder of the number of laps completed and a confirmation at the end of the entire walk. This method would not work well if too many rubber bands had to be worn. In that case, your lap card if a fantastic idea.

I love the ideas you are sharing!