Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.

Building an Iron Man suit can be a daunting task ... good and is one of the best gifts for Marvel fans, adults, and kids. A few years ago Tony Stark snapped his finger with the Iron Gauntlet ...