The condom uses a built-in indicator that changes to a different color depending on the bacteria or infection it detects. The students said it may glow green for chlamydia, yellow for herpes, purple for human papillomavirus, or blue for syphilis.

Molecules in the condom attach to the bacteria of common STIs, causing the contraception to fluoresce in low light.

"We wanted to make something that make detecting harmful STIs safer than ever before, so that people can take immediate action in the privacy of their own homes without the invasive procedures at the doctors," 14-year-old Ali said. "We've made sure we're able to give peace of mind to users and make sure people can be even more responsible than ever before."

Other top entries included a hair clip with Wi-Fi that changes color based on your outfit, and sneakers that can charge electronics.