Age 5+. 1 special pen, 24 pages & 2 sticker puzzles. The special pen does it all! 3 in 1 Activities: Invisible ink Magic Pen painting sticker puzzles. Three ways to play Hidden Pictures! Reveal the invisibly printed pictures and answers! A rainbow of colors appear like magic! Unscramble the stickers to create a surprise picture, then find the hidden objects! 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.