Duge, congratulations it's always a welcome surprise to hear what arguments helped people over the edge - I'm sure many instructors would not mind your son participating along with you, though you may need to sign a release. I think it's a responsible thing to teach the young the pleasure and lifesaving techniques of freediving.
On Safety, I think it's safer to dive knowing one's limits and accompanying signs, provided other safety measures are not neglected. Herein lies a big pitfall. Even people with 8 minute breath-holds cannot do without a buddy doing even modest dives. In freediving competitions people are ok, diving solo we see fatalities.
I am back from Egypt safe, and full of beautifull diving experiences, and with ton of material from my GoPro 3 Black :thankyou Was really amazing...
Hope I will post some nice video soon.
Thanks for all the advices, and we will go to the national freedive center to take the course
Keep wet and safe!