B.M.
Not at all I started at about the same age with my 2 and they are 3 and 5 now. The greatest reward is when we are out and everybody who is around my children tell me how well behaved my kids are its great. They love stickers still. They have sticker albums that we still use together just for some arts and craft time as well.Actually thats what my son did for his 100 days of school project...a sticker poster of 100 animals that would be on noahs ark it was really cute 1 we will save for a keepsake.