My seven year old loads the dishwasher, cleans the table, her room, and folds the laundry- usually better than the almost 10 year old.
My 7 yr old DD puts the silverware away from the dishwasher, not the rest since she can't each the cabinets yet.
My 7 year old DS dusts with a feather duster. He actually loves doing that.
My 4 year old DD cleans out the tub (of toys) and puts up the bath mats.
I'm always looking for new ideas also.