Some toothpastes contain harsh abrasives which can wear away young tooth enamel. When looking for a toothpaste for your child make sure to pick one that is recommended by the American Dental Association. These toothpastes have undergone testing to insure they are safe to use.
Remember, children should spit out toothpaste after brushing to avoid getting too much fluoride. If too much fluoride is ingested, a condition known as fluorosis can occur. If your child is too young or unable to spit out toothpaste, consider providing them with a fluoride free toothpaste, using no toothpaste, or using only a "pea size" amount of toothpaste.