GOLDBURGER
ROBOT FACTORY
NEOk12 SIMPLE machines and videos
TWITCH GAME
matching quiz and bill nye video clips
https://www.brainpop.com/games/timezonexstrings/
https://www.brainpop.com/games/balancingact/
http://pbskids.org/designsquad/parentseducators/resources/index.html?category=simplemachines