This water-based art set offers a mess-free alternative to traditional coloring books, eliminating the need for paints or markers. The kit includes four reusable art boards that reveal vibrant colors and hidden surprises when activated with the included refillable brush pen. Simply add water to the pen to bring the Hello Kitty designs to life—colors fade as the water dries, allowing for repeated use. The spiral-bound pad measures 6 x 7.5 inches, making it compact enough for travel while providing ample space for creative play. The set consists of one aqua art pad with four sheets and one brush pen.