Without paying lots of $ on a rescue mannequin, what is the best way to simultae the rise and fall of a chest for demonstration purposes (ie, CPR) Not ramen noodle budget but feasible for a high school student needing extra credit.

Darin:

Do you simply want to have mechanism which would allow students practice CPR?

How about a store mannequin and some bead springs/

Niel Leon
engineering.com