I really think it's important to give kids jobs when they are little. Ella loves helping me with all sorts of little chores. One of her jobs is to help me unload the dishwasher. She doesn't do it all the time, but when I need help... she is there to help.
Other odd jobs she helps with is:
*putting her clothes in her drawer
*making her bed every morning
*after I sort clothes putting hers into the washing machine
*always picking up toys
Those are just a few things that I think a 4 year old is capable of doing in order to help around the house.
She actually loves being mommy's helper.