OK,

My son plays Minecraft, he's 10 years old, almost 11.
What he loves are all the "Let's Play" Videos on Youtube. In fact he's infatuated.

What he want's more than anything right now is to stop watching them and start creating them.
Yes, he wants his own "Let's Play" channel on YT.
I can't imagine why anyone would want to sit and watch someone else play a video game for hours but he does and there are lots of people who do.

In my mind, this may be the opportunity I've been looking for to switch him from being a zombie user to being a productive creator of content. He loves computers and this may be the hook needed to put him on the road to what may lead somewhere productive.

What I need is to know how to do it.
How do you play Minecraft (or any game) and record the screen play while also recording your own voice as you go?
And also, to do it cheaply or free. He wants to use his birthday money to get what he needs to do this. Hopefully I can get him up and running without him using up all of his money - Remember, He's only 10 (Turning 11 in May)
Doing this Free would be better but I don't know if this is possible.

Please share your wisdom with us.
Cheers!