It’s always great to hear stories about Chris Pratt, but hearing stories about Chris Pratt’s son, Jack? Even better. Time really flies when talking about Jack — born in 2012, he’s already a fun and inquisitive four-year-old.

Last night on Jimmy Kimmel Live, Pratt talked about how he got to give Jack a tour of the Guardians of the Galaxy set. If you think that the scenery and set are impressive, just imagine what it’s like for a kid.

Fans have seen Jack grow up before their very eyes. Born at nine weeks premature, Jack’s birth was definitely a terrifying experience for Pratt and his wife Anna Faris.

Luckily, Jack is a healthy and happy boy, who seems extremely proud of his dad. Especially since he’s under the impression that his dad owns and drives a real spaceship.

After a fun clip from the movie, Pratt talks about entertaining Jack on the set.

Pratt’s co-star Michael Rooker added that it was definitely a fun and memorable day for everyone.

You can check out Pratt, his spaceship, and the rest of the cast in Guardians of the Galaxy: Vol. 2, out in theaters on May 5th.