Who said "Adventure is out there if you look for it."?

This quote is attributed to Kenny McCormick.

Adventure is out there if you look for it. - Kenny McCormick

"Adventure is out there if you look for it."

Kenny McCormick Adventure

"Mmph mmph mrmph!"

"I'm not fat, I'm just big boned"

"Dude, we're in third grade"

"This is so cool"

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."