He is the spittin' image of my part Bengal boy, Oscar. Oscar is getting old now, but when he was young he could jump straight into the air close to five feet from a dead standstill. Does your boy like water? Oscar had some interest, but not as much as many Bengals do.
Our new cat, Elvis, is a tuxedo polydactyl guy. He has got to be the dumbest cat I have ever met. My husband hates him and says, "he's got the IQ of a rake!" lol!!!!
But, he played fetch , like your kitty. I would through his ball (coincidentally, the same kind) down the stairs to the basement, and Elvis would LAUNCH himself into the air , down the stair without being able to see where he was going to land and he'd bring it back up the stairs for another go.
Somewhere along the way he forgot how to play and no amount of encouraging can bring it back. He is dumb as a rock, but I love them both.