Freak and Max met in preschool. Max is known as kicker, since he always kicks the other kids. Max never kicks Freak, since Max was intrigued by Freaks Crutches, which made him look like a "robot".
Max and Freak meet again, the two met when Freak got his ornithopter stuck in a tree. Max got a growth spurt, but Freak had a syndrome called Morqio Syndrome. Max also lives in his grandparent's basement.
Freak and Max have a conversation in Maxs' room/basement, and Freak makes Max look like a total idiot. Max doesn't know who King Arthur was, so Freak explains to Max