J.S.
I LOVE sticker charts!! I have 3 kids...7, 4, and 8mos. I use them for both of my older kids. I started using them close to 2yrs old, and for just about everything!! Chores, brushing teeth, homework, potty, etc. I have one in the bathroom for my 2 older kids for a "reminder" to brush their teeth. My 7yr old uses one for his chores & reading. My 4yr old uses it for chores, and good behavior. They were most successful for us with potty training, and now they're a great help with chores as well! My kids get rewards for certain increments of stickers. For example, get 10 stickers, get $1; Get 20 stickers, get a toy from dollar store or similar; Get 1 sticker every day for a month, and we go out to eat at McDonalds! It works wonders. Now, I also run a home daycare & I started this with those kids as well. They get a sticker for completing their workbook pages, for helping prepare for meals, for using good manners, etc. They each get a page for each week. If at the end of the day, they receive all 5 stickers, they get to choose something from my "reward box". That box consists of small things...pencils, candy, stickers, cheapy dollar store toys. It is great with them as well & they range in age from 1yrs up to 5yrs.
I think if used in a positive way, they can be great for both the children and the parents!!