Who said "Gee, happiness is found in the simplest things."?

This quote is attributed to Mickey Mouse.

Gee, happiness is found in the simplest things. - Mickey Mouse

"Gee, happiness is found in the simplest things."

Mickey Mouse Happiness

"Hot dog!"

"Oh boy!"

"Gosh!"

"That's swell!"

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."