In addition to its everyday uses with a variety of liquids and textures for general artwork, this giant size tray (22.25" x 17.32" x 4") has been cleverly designed to fit over the TickiT® Light Panel (part# 9200) to provide a space for the illumination of light and color activities. Made from clear polycarbonate giving it incredible strength and longevity in the classroom where its rigidity means that even when filled with water it can be lifted and moved around without it flexing. The internal size of the tray has been designed to easily accommodate a standard size sheet of paper.