We all know the struggle: you’re supposed to do homework, but TikTok calls. Turn your bad habit into a science project. For one week, use a screen-time tracker app. Then, for the next week, keep your phone in a different room. Compare your mood, sleep, and homework speed.
Measure your heart rate with a smartwatch or a finger pulse oximeter (cheap online). The data will be shocking. You’ll see your stress drop by 30% when you don’t have your phone nearby. This is real psychology—called “digital detox.” Judges love projects about behavior and health.
The hilarious part
You can title your board: “The Great TikTok Withdrawal of 2026.” Bring a printed chart of your mood swings. Show them the hour you cried because someone liked your photo three weeks late. It’s vulnerable, it’s real, and it wins. Plus, you’ll actually improve your life while pretending to do homework.
Science Fair Project Ideas For 7th Grade Girls
