My DD is almost 3, she is required to clean up her toys, help make her bed, throw out the bathroom trash (that was all her idea, she started doing it & basically won't let anyone else do it.), put the silverware away (again, her choice) & anything else she wants to help with.
We have the kids pick up their toys, etc. 6 year old takes out the trash in his bathroom (and deposits it in the kitchen trash) and picks up their clothes and puts them in the hamper. If he does these things without being told to do them he gets a quarter per task.