Robert Downey Jr, Chadwick Boseman, Elizabeth Olsen and more sat down with PEOPLE to answer some their youngest fans’ most burning questions. First up, 12-year-old Alex wanted to know which super-villain has the best sense of humor.

“Probably the Mandarin from Iron Man 3 because he wasn’t even really the super-villain he was saying he was,” said Downey Jr. “He was like some dumb actor playing the part. Kind of like, well, you can fill in the blanks.”

As for which other Avengers character the stars wish they could play, Boseman immediately knew his answer.

“Spider-Man,” he said. “I always liked Spider-Man growing up. Second would probably be Hulk, but he’s got some psychological issues that I wouldn’t want to deal with.”

Meanwhile, Olsen said she’s looking for more action.

“I love my character but I want to fight more,” she said. “I really like feeling strong and powerful.”

And 5-year-old Caoimhe wanted to know what the Avengers eat to stay strong.

“If you want to be big and strong, McDonalds and doughnuts,” joked Josh Brolin.

Watch the video for more cute kids and clever answers. Avengers: Infinity War hits theaters April 23.