These world leaders had more contributions to our country than just foreign policy and a great head of hair.

Many things we still use today were invented or inspired by these presidents, including household staples like air conditioning and teddy bears. Others, like jazzed-up walking sticks and steamboat improvements, have sadly fallen out of favor.

So this President's Day, be thankful for more than just a three-day weekend and legions of President's Day sales.

Be thankful that we elected into our highest office men of ingenuity and creativity, even if they weren't the most egalitarian men for the job (looking at you, Teddy Roosevelt).