I know this is an old topic, but just in case anyone comes across it via Google, as I did:
First of all, to introduce myself, I'm an actor and director with two children - one of whom is a professional (adult) actor.
I would recommend steering well clear of Celebrity Talent Academy. They charge huge sums of money and give very misleading advice. The way they try to recruit people is - to put it bluntly - dishonest. I'd be more than happy to debate with someone from the academy about my doubts and opinions!
If you are looking for good training for your son, steer well clear of anything that has the words "celebrity" or "fame" in its literature. It is NOT necessary to pay for expensive "training" to give your son opportunities. Please don't be misled by the information you get from Celebrity Talent Academy. If your son wants to pursue professional work while he is young, then the best possible support you can give him is to equip yourself with knowledge about how the industry works. No-one in the industry will be remotely impressed by someone attending CTA so he is not losing out by not attending! I'd be happy to give specific information if you think it would be useful. To get professional work you really need an agent - you DON'T need CTA.
If your son enjoys performing he will, almost certainly, get far more opportunties to do this as an amateur in local opportunities (youth groups and amateur dramatic societies) than he would as a "professional". It will also be much less costly and disruptive. I can expand on that if it's useful.
My son attended a state school in a small town, he went to a local Saturday drama club, set up his own theatre company with his mates in his teens, did GCSE's and A levels, went to drama school at 18 and is now making his way as an actor. He's with the RSC at the moment which is wonderful - but he was pulling pints at a local pub for several months last year! The only certain thing about a career as a performer is that it's an uncertain one...no matter how talented you are.