He's taking his kids: Morgan, Harley, Peter, and Nebula, out on an outing using one of those field trip chains XD
This was one of my most popular artworks on insta back in day(2019)
It's mostly fandom made that Nebula is one of Tony's kids. It's pretty much cause they bonded on the ship BUT I'M HERE FOR IT CAUSE SHE NEEDS A BETTER DAD THAN THANOS!