I’m showing a super fun science craft—how to make secret Valentine's Day messages using just paper towels, markers, and water. In this video, I guide you step-by-step as I write hidden notes that ...

Check out how to create a unique Mechanical 7 Segment Display using cardboard! In this video, we unveil a one-of-a-kind mechanism that we've invented, featuring 7 circles each with its own trigger.