No cups, no brushes, no mess! This 18-piece classroom marker set consists of washable sponge-tipped markers that make art time easier and cleaner, especially for little hands. They’re washable, made with a special non-clogging formula that won't dry out, even if the markers are left uncapped. Do-A-Dot Paint Markers are 5" long and contain 2.5 oz (74 ml) of paint. Perfect artists ages 3 and up.