Product Details [easy To Color And Clean]: These Glow In The Dark Markers Use A Rotating Design That Can Be Turned On And Off In An Instant. It Can Be Easily Colored With One Swipe, Saving You A Lot Of Time. In Addition, These Neon Pens Are Very Easy To Clean, Just Use Water Or Soap To Clean Them Without Residue. It Is An Indispensable Small Tool For Every Party Game Session. [safe Coloring]: These Glow In The Dark Paint Crayons, Like All Cosmetics, Do Not Contain Harmful Chemicals, Whether For Children Or Adults, They Not Irritate The Skin. If You Are Still Worried, Then I Suggest That You Can Also Do A Small Skin Test Before Use, After All, Everyones Skin Is Different. But In I Believe You Like It! [amazing Luminous Effect]: After You Apply Different Colors On Your Face, You Have To Believe That There Is A Miracle In An Instant, These Glow In The Dark Markers Glow Brightly Under Ultraviolet Light Or Black Light. This Is An Unparalleled Beauty And Fun, And Your Moment To Show Your Style At The Party! [wide Range Of Use