I have just read the responses ! They are great !
As a parent educator for 17 yrs, I have seen the outcome of children who have not been given any family responsibilities. For example: It's much easier for both of you if she begins small tasks now. Try asking a teenager w/ an "I am entitled" attitude to do chores.
She can "set" the table and be responsible for clearing her dish (daily). If not, she has "chosen" not to have playtime before bed. Be consistent.
On the weekends, she can do some of the chores the other Moms have listed. To make her feel responsible, read a list of 6 chores and ask her to pick 3 while you are doing the other 3. When my daughter was little, I would put on a certain music tape when we cleaned.
Explain to her that she is going to help out w/ chores when the next weekend comes OR when the calendar changes to April. Again, be consistent, unless you are away for the weekend, etc...