Rock vs. paper, accelerating washers and drop it, don't break it. Explore gravity and how an object's mass determines its force of gravity and the accelerating rate with which things fall.
STEM Challenge: design and build a protective container for a raw egg to withstand a fall and impact on pavement.
Watch it now at video.wkar.org
Curiosity Guide #108 - Gravity (PDF - Acrobat Reader recommended)
Ep. 108 first air 12/22/14