Welcome to TST.
The driver you reference is pretty cool. I have one and quite like it. My 4-wood is also adjustable.
As for kids golfing: my guess is when they want to. My sort-of niece has a plastic set (I think?) from her father and I told them that when she wants to play, I'm happy to treat to materials including buying her her first set of clubs.
I made some attempts at golf in my two rounds this past week, but the best shot of the week was a scuttle 70 yard chip and run down the hill under the tree of the cart path to just off the green about 25 feet from the hole at the par-5 18th at Afton on Saturday. And I made the putt for birdie, too.