Kingston and Crusader from Room 17 have been reading "Maximum Boy" by Dan Greenburg.
Max "Maximum Boy" Silver is a 11 year old hero. He lives on the north side of Chicago next to Lake Michigan. He lives with his mum, his dad and his teenage sister, Tiffany. He has braces, glasses, and superpowers: he can lift freight trains, fly faster than a space shuttle, and burp the alphabet. He has an adult friend named Porter "Tortoise Man" Torrington, who has a power called the Tortoise Ray.
Read more about this series here