This beautiful wooden sand tray complete with 1 lb. of sand and a chalkboard lid is perfect for letter-writing practice. Three plastic sheets in red, yellow and blue can be inserted inside the tray under a clear acrylic base; Place the tray on top of a light table for color mixing and to enrich the child's experience when learning to write letters; Tray size: 8.85 inches x 8.85 inches x 2.55 inches ; 1 lb. of Sandtastik sand included; Tray can hold lid straight for teachers to write letters on chalkboard; Extra clear plastic sheet provided to place on top of acrylic tray base for extra acrylic protection when sand is placed inside tray; alphabet sand tray sand tray prewriting prewriting sand tray alphabet sand tray sand tray prewriting prewriting sand tray