Both of my children get stain on their teeth really bad. I was worried they would get made fun of at school because of it. Their dentist suggest this for them and it has been a game changer. Not only do they willingly brush their teeth and enjoy it, it has kept the stain off! We went on vacation for a week and didn't have them and the stain came back but it went away just as quickly when they used these again. It has a timer and one kid will tell on the other if they stop before the timer is done. At the last dentist visit, she said she could tell the kids were using the different toothbrush. I hate that they are so expensive but it has honestly proven to be worth it for us.