Watch: Thomas invites teen from playground to Celtics game

Isaiah Thomas is the gift that just keeps on giving.

The All-Star point guard recently warmed the hearts of the basketball world when a story emerged of him joining 14-year-old Robbie McNulty to shoot some hoops at a playground in Cambridge, Mass. Thomas was in the area attending a parents' night at his kids' school and noticed that McNulty was playing by himself.

Related: Celtics' Thomas surprises teen on playground

That chance encounter won't be the last time the two will cross paths, though. Thomas surprised McNulty during an appearance on ABC's "Good Morning America" on Monday by inviting him to a Boston Celtics game this upcoming season.

"What's up, Robbie? It's Isaiah Thomas. Thanks for letting me shoot hoops with you the other day," he said in a pre-recorded video. "Keep working on that jumper. I know we talked about this upcoming season, and I'd like to invite you to one of my games as one of my guests. See you at the Garden."