Attention all girls! It’s time to keep your secrets safe by outsmarting the boys and even grown-ups! The Girls Only! Secret Message Lab is full of ways to keep secrets safe, and share them with your friends. Plus, you’ll get to learn the science behind This kit comes with 25 crafty ways to keep secrets. You’ll use chemistry to make invisible ink that won’t appear until you want it to, and even see how to write your own secret codes that can be deciphered into secret messages. The included 24-page booklet is loaded with activity instructions, science facts, and some of the most important secret messages through history.