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 ...

Have you ever wanted to send a secret message to a friend that no one else can read? Invisible inks can help you do that! When you use an invisible ink to write a message, it quickly disappears. The ...

Using the Notes app on your iPhone as a messaging app is a surprisingly clever way to have a discreet conversation. You can use it to plan a surprise party for a loved one or disguise sensitive ...