R.C.
I know you asked about reward charts, but as the mother of two teens and an 11 year old, I would like to point out that there is NO substitute for PRAISE!! I really don't like the idea that children do what it expected of them to do normally just to get a prize. I think it sets up a bad idea in their minds. There is no substitute for a hug and a smile. There is no substitute for praising your child. Be sure that you are giving your child affection ALL through the day. I don't mean you have to sit and hug and kiss your kids all day, just a quick hug, a smile, a pat on the back--really goes a long way.
You said you used reward charts for potty training: I am curious, do you use them still for that? Does your child get a sticker still every time he/she uses the toilet?? Probably not. I honestly don't think they should be used long term. For learning a new skill-yes, but for just listening and doing what they are told--NO!! Is an employer going to give your teenager a sticker every time he shows up for work on time? NO. We all need to keep in mind what our goal is in raising our children. We are raising them to be ADULTS! Responsible, thinking, productive ADULTS!
Often I think we devise all these tools, but we leave out the human contact and BELIEVE ME, when they get to be teenagers, it is soooooooo important to have that ground work laid.
Your 4.5 year old is not too young to understand helping and you can have discussions instead of nagging. I like some of the ideas others have put on here, but DON"T leave out the love and be sure you are aware of some of the consequences behind a child thinking he/she must always get some monetary/tangible reward when they do something that they should do anyway. I explain to my teenagers (even before they were teenagers)"this is your house, it is your responsibility to keep it clean. These are your toys, your clothes, as a parent it is my responsibility to teach you to take care of your stuff, but it is your job to do what I say."
I like to praise my children in front of their dad or grandparents, like at the dinner table, "Cortney did a great job cleaning the kitchen today, or Carlee helped make the salad, have you tried it yet?" This is a BIG boost for a child. I quit giving my children monetary rewards the day I asked my daughter to clean her room and she said "Will you give me a dollar if I do?"
Feel free to e-mail me privately if you want to talk more about it.
____@____.com
P.s. I hope I don't sound harsh--I just have learned a lot over the years and I now try to parent from THE HEART! There are lots of books, devices, MAGIC this and that, and some work, but you must parent from the HEART more than anything.