Pricey but your kids will love them
My son is 5 and I bought him the Sonicare for Kids when he was 4.  He didn't have a problem brushing his teeth but this brush made it more fun for him.  And that kept him cleaning his teeth longer, which is important.  He still has his baby teeth and the smaller heads on these refills makes it much easier for him to maneuver within his mouth.  Although they can be pricey, if cleaned and stored well, they last a long time.  Spend the extra money now and ensure your kids learn good dental hygiene from the beginning! I gave 4 stars only because the price is high when compared to buying adult brush heads which can be had much cheaper.  Otherwise, these heads are great quality and will last.
Rating: 4 stars