Cats and Coupons

My sons both receive an allowance. My older son gets money. My younger son doesn’t understand the value of money so each week we spend his allowance on some Thomas the Train toys, because they are his favorite thing in the world right now. In exchange for their allowance the boys are expected to do something. My older son is expected to keep his room neat and help with the garbage and the recycling (taking it out). My younger son feeds the cats and puts the silverware away when we unload the dishwasher. Do your kids have an allowance? If so, what are they supposed to do to earn it?