Children usually begin shedding their baby teeth from around 6 years of age. From 6-12 years, youngsters have a mixture of adult as well as baby teeth. By around 12 years, the majority of children have all their grown-up teeth with the exception of the third molars (wisdom teeth). There are 32 adult teeth. If your child's primary teeth came late, the grown-up teeth will possibly be late also. If you're concerned about kids dentist and your child's teeth growth, see your dental professional.