“There are a lot of things that go on in St. Louis that are not always positive, especially in the inner city,” Tatum said. “For these kids to come together and do something positive, that’s great for St. Louis, and for them. Because there’s so much they see outside of the building — like I saw when I was younger — that’s not always what’s best. For them to come together and have an impact on somebody else, somebody they will probably never know, that can go a long way.”

The kids delivered. So did Tatum. He signed big, loopy autographs for shy girls who hid behind their posters as soon as he handed them back. He flashed his signature smile for countless photos. He pulled his phone from his pocket just once, to capture a dance that was practiced just for him.

There were video games — basketball, of course — and actual basketball — knockout! — and bass-thumping songs flowing from the speakers. The most popular was about Tatum. The kids knew the words.

Pull up, shoot. Jayson Tatum.

My money’s tall. Jayson Tatum.

I’m balling on you boys. I think I’m Jayson Tatum.

Swish.