Don’t freak out if your kids say they need your help with a school project involving bugs. They might not be real and you could discover something that becomes a big deal. That’s what happened to a 14-year-old 8th grader named Ethan Manuell recently, as he worked on his school science fair project. He decided to use plastic robotic bugs that vibrate. While working with them, he discovered that zinc batteries last up to 85% longer when they’re first exposed to air. The cool thing is the batteries are also used in hearing aids. Ethan has worn once since he was four. Now because of his discovery, Ethan and seven million other Americans who wear hearing aids can change the batteries in them less often, and save money.