phet-credits lead-design=Sam Reid (Energy Skate Park) & Noah Podolefsky (Energy Skate Park: Basics) software-development=Sam Reid design-team=Wendy Adams, Michael Dubson, Trish Loeblein, Emily Moore, Ariel Paul, Kathy Perkins & Carl Wieman,  interviews=Danielle Harlow, Noah Podolefsky & Ariel Paul