Before you choose toothpaste for your children, you need to first think about their safety. Most of the brands used by adults actually contain abrasives that could harm your child’s delicate teeth. Additionally, adult toothpaste has fluoride which is harmful for young children if they use a lot.
http://www.smilesdentalgroup.com/2015/09/01/how-to-choose-the-best-toothpaste-for-your-child-and-role-of-pediatric-dentist/