This is hanging on the side of our fridge...and has been for years! I shared it a while back but I still have so much success and so many compliments about it that I thought I would share again.
My three kids each have a magnet and if we catch them doing something wonderful like helping each other, talking soft, doing a job without being asked, etc then we tell them to go move forward a base. Once they hit a home-run they get to pick something out of the basket.
Our basket has a lot of little dollar store items in it, coloring books, gum, cars, but most of it is coupons that say things like:
bike ride with Dad
donut with Mom
pick the family movie
use of Mom's art supplies
ipad time
computer time
pick the family game
This started because we feel strong that children will model the things they are praised for much much more than the naughty things that they get in trouble for.
It's very motivating to the child that is watch the other sibling making a home run and they want one too. The best part though is that it's not a set time that Justin and I have to follow through with all the time. The kids are not allowed to ask us about it. We just have to notice! So, super easy for us and makes them on their toes doing lots of good things if they have something particular in that basket that they are after.
hint: have your kids pick out what they want in the basket :)
