Everybody can get one! Colorations® Classroom Compacts are 4" round paint trays filled with 6 standard colors. The tray's clever stack-and-twist design allows for easy storage and fast clean up! Colors are bright and more brillant than ordinary watercolors. Each compact has a clear plastic lid that can also double as a small art tray and paint tray has an empty center compartment for mixing colors. Non-washable and non-toxic.