This set includes two activity and coloring board books, each with a refillable water pen. The books feature vehicle and animal themes to engage young users. The reusable white pages display simple line drawings when dry and reveal colors when wet. The water pen has a chunky design for easy filling and gripping. The spiral-bound format is compact and travel-friendly. The product is made with FSC-certified materials (FSC C156584), supporting responsible forestry. This certification applies to new inventory only.