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 ...

A Hillhouse student’s eyes widened as he applied grape juice and heat to what appeared to be a blank piece of paper — but instead held a secret message in invisible ink, written as part of a course ...

Write a secret message using the juice. Whoever receives it can reveal the message by holding it close to the hot light bulb. Share your messages with us by emailing a picture to [email protected] or ...