Introduce a "Graph-a-Day" with the Multilinkr Graphing Board Kit. Using a dry erase marker to label the graph, kids of all ages will enjoy making and interpreting graphs. Wood board with dry erase surface, 23" x 16" (56cm x 40cm), comes with marker and Instructional Guide. Kit includes board plus 200 Multilinkr Cubes, 100 Isosr and Multilinkr Crayons.