If chores are a constant battle in your family, then there is a Website for you: ChoreWars.com.
Basically, your household's chore workload is transformed into an online role-playing game, like the ones your kids are already playing.
The family determines what the chores are, and how many "experience points" each one is worth, making a nice little competitive incentive between the players. So, a little healthy sibling rivalry could give you a much cleaner house!
Just like in role-playing games, players create online players, and assign themselves special talents, like "taking the bins out" and "gardening".
Basic accounts are free: gold accounts, which allow you to see more historical chore data, cost a one-time charge of $10. Gold accounts are permanent.