Yes, they can take scuba diving lessons. Rules by recognised diving institutions like PADI state that the minimum age requirement for learning recreational diving is ten years old. Students aged 10 to 14 can earn the PADI Junior Open Water Diver Certification, then upgrade to PADI Open Water Diver Certification when they turn 15. Kids under the age of 15 may need permission from their parents or guardian to take lessons, so please check first with your state’s laws.