Age 5+. 1 special pen, 24 pages & 30 stickers. Invisible ink. Magic pen painting & stickers. The special pen does it all! Reveal the invisibly printed pictures and answers! A rainbow of colors appears like magic! Use the stickers to create silly sentences! www.leemagicpen.com. From the makers of Yes & Know game books. Facebook: www.facebook.com/magicpens. Conforms to ASTM D4236 - non-toxic. Printed in USA.