REUSABLE: Pages that fill with vibrant color when wet and naturally disappear after 5-10 minutes later dry kids can draw and play again. The reuseful fun water drawing book are not a single-use item. EASY TO USE: Chunky-sized water pen is simple to fill and use and is designed with grooves so it is easy for your little one to grip. The spiral-bound format of the doodle boards makes it convenient to carry. Manufacturered by Jenilily. SAFE & DURABLE: Non-toxic water painting book is safe for kids to enjoy drawing without ink which makes mess free away. Book size: 7.9 x 7.5 in. Pen size: 3.93 in. IDEAL GIFT SET: Water coloring doodle book is the perfect gifts for age 3+ children to keep entertained at home or on the go to enjoy the early education by parent-child time. THEMED ACTIVITY BOOK: Cartoon Farm Animals & Dinosaur & Vehicle-themed coloring books to encourage kids to develop basic perception of reading & writing creation imagination and visual discrimination.