My son did his OW at 10. We went to Bonaire after that, but I would really consider taking a 10 yr old to Bonaire, and introducing him or her to snorkeling and diving. Great (easy ) place to start, and your child could easily become certified while you are there. Many resorts there offer OW courses, and you could be diving while your child is in class, and then dive with them after they are certified.
The diving on Bonaire is spectacular, the shore entries are mostly very easy, and you could share your love of the sport with your child, as they first discover the beauty of the reef for them self!
The diving on Bonaire is spectacular, the shore entries are mostly very easy, and you could share your love of the sport with your child, as they first discover the beauty of the reef for them self!