"He was crying the other day, and I had him on my lap. So we watched this 15-minute highlight reel of Grave Digger on YouTube, and dude, it was so badass!" the Guardians of the Galaxy star recalls. "He and I both were just wide-eyed. Now he goes around saying,'Monster trucks, monster trucks!'"
As for his tip to the adults looking to break into show business, the 35-year-old Parks and Recreation star jokes, "Just be yourself, and hopefully they can shape an epic space adventure around exactly who you are."