Add Yahoo as a preferred source to see more of our stories on Google. Need some gifts for your kids, grandkids, nieces and nephews? More specifically, gifts they won't toss aside as soon as they open ...

(KERO) — People have seen it in spy movies, secret messages written through invisible ink. As it turns out, the average person may have all the ingredients needed to make their own invisible ink right ...

Remember the magic of Yes & Know Books—the beloved invisible ink puzzles that transformed everyday moments into exciting detective work? Well, get ready to rediscover that wonder, because their maker, ...

Step into the hidden science lab in your kitchen with five easy experiments that explain refraction, surface tension, ...

Putting secrets in texts is risky business. An email is almost certainly a no-go, as is a traditional SMS. Encrypted texting, like iMessage, is better, since only your device and the recipient’s can ...