Trade hidden messages with your friends and practice your spy skills with this fun kit! Invisible ink markers keep secrets safe. Use the cap blacklight to see messages appear like magic. Protect against prying eyes and learn how to create your own secret codes for added mystery. Reverse words, assign numbers, make your own symbols, and more! Creating codes encourages creativity and critical thinking, too. Set includes 2 notepads and 2 invisible ink markers. Package measures 6'' wide x 9'' high.
