Kid Scientists, Elizabeth Banks, Edward Sharpe & The Magnetic Zeros Late Show with David Letterman : Season 19 Episode 70

Dave welcomes Kid Scientists, actress Elizabeth Banks, and musical guests Edward Sharpe & the Magnetic Zeros. Kid Scientist Cairo Lawrence demonstrates her "Newtonian Headgear". Kid Scientist Jack Brandt demonstrates the "Can Crush". Elizabeth Banks recalls a family road trip where her sister got left behind at a McDonald's.