Play with your favorite SpongeBob Squarepants™ characters in this 3in1 activity book. The activities include Magic Pen® Painting, Invisible Ink and Sticker Puzzles. The Special Pen reveals the invisibly printed pictures. The Special Pen also produces a rainbow of colors instantly. Unscramble the stickers to create a surprise picture. Each book includes 24 pages of fun, a special pen and 2 jumbled sticker puzzles.