Unleash Creativity: JoyCat click Marker set includes 20 colors, perfect for any art supplies for kids, learning & education toys, or party favors. These washable markers are designed to help children unleash their creative skills and boost their thinking. Safe: Made with non-toxic materials, the Retractable markers kit is great for kids ages 3 & up. Each of the markers meets the requirements of ASTM-D4236. Travel Friendly: Forget about stray marks, lost caps, and dried out markers! our art markers set are specially formulated to feature easy-click tips to make creative travel activities a breeze. Washable Click Markers : Our washable markers can easily rinse the ink with water, minimizing the mess.so you don't need to worry about cleaning！Tip:Not specifically for whiteboard and may leave stain on whiteboard but can be washed using wet wipes.