The Kinetic and Potential Energy of Roller Coasters

I saw THIS idea from my friend Jennifer at Teaching to Inspire in Fifth and fell in love with the idea. I knew that I wanted to do it with my 6th graders when we did our energy unit.
I adapted her ideas a little bit.  My rules were the following:

• Must have at least two "hills" 
• Must have two carts showing potential energy, one of which must show the greatest potential energy 
• Must have two carts showing kinetic energy, one of which must show the greatest kinetic energy
• All cars need to have the type of energy it has labeled.

My students LOVED this activity as much as I did (plus it allowed me to work with my 5th graders...)

Two of my boys got really into the design and made obstacles in their roller coasters.