Setup a Leader Board with our tool and reward your kids when they help you out!
Don't make it too complicated you could make a list of tags like:
Don't just celebrate the achivements, make a leader board that show the efforts of your collaborators, and celebrate with them a long day of calling.
A list of tasks could look like:
Duty.house can also help you in keeping track of a simple score.
For example if you have a chess tournament you could have a log with only one task: