I betcha I can fold these towels faster than you can fold those napkins! GO!
Races are the ultimate way to get my grade-schooler to take on a chore with no protest. Laundry, baskets of random stuff, piles to sort through - split them into two and test your speed. At our house we both get the toddler obstacle just to shake things up a bit. If we're really clever we form an allegiance with him and assign a simple task. "Put this book on the shelf, please!" And if he's feeling clever he puts the book in the other person's pile. He's good.