In addition to finishing their invention infomercials as described in the previous post, the 2/3 STEM class jumped into their exploration of energy this week. Our final STEM project explores renewable and nonrenewable energy, and how to make our homes and school more energy efficient. To figure out what energy actually is, through both potential energy (stored) and kinetic energy (energy of motion), the students designed LEGO balloon cars and used the engineering design process to test and improve upon their designs to see how far they could travel using the energy of the balloon.