IzzyTahil once bubbled...
whats the min age now for padi ow 10 or 12? my son will be 6 and itchin' to get certified
At 8 your son could try the PADI Seal Team. It's pool only (so max depth will be about 9-10 feet). They complete 5 dives, typically over a 2 day period (one weekend) which teach them some basic skills (use of the BC, buoyancy, mask clearing, snorkle-regulator exchange, etc.). After they complete those, there are 10 additional Specialty Aqua Missions (like night [lights out], wreck, skin diving, Search & Recovery, snapshot, and creature ID) they can do to become Master Seal Team members.
My daughter did all 15, had a great time with great instructors (AI's or above can teach Seal Team), and when she turned 10 and did her Junior Open Water Certification, she was already so comfortable in the water that she breezed through the practical skills. Adult students and instructors were very impressed. I definitely credit the time with the Seal Teal for that.
During the Seal Team time (before OW classes) I started her out reading dive tables. When you turn learning into a game, it's amazing how hard kids will "work".
My only caution is to find an LDS that specializes in "family diving". Not all shops have gear (BCs, wetsuits, and reg mouthpieces) that will fit a child. When you're swimming along and the BC is so big on you that the tank keeps shifting from side to side, it's hard to concentrate on the skills.