Kids generally begin losing their baby teeth from around 6 years old. From 6-12 years, kids have a mix of adult and baby teeth. By around 12 years, a lot of youngsters have all their grown-up teeth besides the 3rd molars ( knowledge teeth). There are 32 adult teeth. If your kid's baby teeth came late, the adult teeth will most likely be late as well. If you're worried concerning kids dentist as well as your kid's teeth development, see your dental expert.