I started this system a few years ago, I don't always use it, but when I do it's a great way to get my kids to pitch in and help during mealtimes.
Here's how it works:
Each one of my kids has a picture on a mini hanger. There are 4 "mealtime jobs" Cook, Set, Clear and Wash.
One kid helps mom cook, one sets the table, one finishes clearing (they all have to clear their own plates), and one washes the table.
The kids know exactly what their job will be and after every dinner the hangers can be rotated to a new position.
Fun and functional!