Reddit reviews Magic Yo-Yo N12 Super Professional YoYo + String + Free Bag +Free Glove (Blue)

for the "How in the hell is he doing this?" It's practice. He's recorded a few demos if you want to see him break his tricks down into steps...

https://www.youtube.com/watch?v=80sA9pDiLXQ

For the yoyo for the kido.(you say he's a thrower, so I assume he knows at least a little bit of what he is doing) Something like the N12 should be fine https://www.amazon.com/Magic-Yo-Yo-Super-Professional-String/dp/B00J624XGK.

I've seen a lot of people recommending the N12 recently, though I've never used it myself. I'm probably even more of a beginner than you are. I just picked up a Yoyofficer Tusk myself.

http://www.amazon.com/Magic-Yo-Yo-Super-Professional-String/dp/B00J624XGK/ref=sr_1_1?s=toys-and-games&ie=UTF8&qid=1463702912&sr=1-1&keywords=magic+yoyo+n12

If you still want the real thing, this is a legitimate one. The seller listed there sells legitimate MYY yoyo's.

Edit: Side note, Beboo is pretty much all poor quality yoyo's that use common names in order to get sales the way you bought it.