Designed to build the visual perception skills of the most creative puzzlers, Mystery Mosaics: Book 18 is filled with 18 amazing images disguised as numbered squares. At first glance, you will have absolutely no clue what each completed picture might turn out to be...follow the number guide, apply color, and watch an incredible mosaic design take shape! Featuring 18 perforated pages including 4 fold-out, 10" x 15" double-page spreads, this book pairs perfectly with our brilliantly hued, 36-count Colored Pencil Set (sold separately). The book and pencils are printed with coordinating numbers to make your coloring experience even more relaxing and enjoyable .Age Recommendation: Ages 6 and up.