Who said "Play is whatever a body is not obliged to do."?

This quote is attributed to Robert Frost.

Play is whatever a body is not obliged to do. - Robert Frost

"Play is whatever a body is not obliged to do."

Robert Frost Happiness

Poet American 1874–1963

"Two roads diverged in a wood, and I took the one less traveled by."

"The only way out is through."

"Good fences make good neighbors."

"Fire and Ice."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."