Kids usually begin shedding their primary teeth from around 6 years old. From 6-12 years, kids have a mixture of adult and primary teeth. By around 12 years, most children have all their grown-up teeth besides the 3rd molars (wisdom teeth). There are 32 adult teeth. If your kid's baby teeth came late, the grown-up teeth will most likely be late as well. If you're worried concerning kids dentist and also your child's teeth development, see your dental professional.