Students develop a concrete understanding of the concept of ten and patterning with these connecting train cars, each holding 10 Unifix Cubes. By filling the spaces and connecting the cars, children can see and feel "10 and some more," 20, 30, etc. These trains are also very good for use with Singapore Math activities. Details:Blue For individual or small group useAges 5 and upContents: 10 Cars20 Unifix CubesTen-Frame SpinnerTeacher's Guide