Who said "Even small acts of kindness can change someone's day"?

This quote is attributed to Kenny McCormick.

Even small acts of kindness can change someone's day - Kenny McCormick

"Even small acts of kindness can change someone's day"

Kenny McCormick Kindness

"Mmph mmph mrmph!"

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

"Dude, we're in third grade"

"This is so cool"

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."