A pack of sorting activities to teach children how to sort. Children sort objects onto the cute jar sorting mats. The jars have different lids to specify or depict the criteria used. You can also choose your own criteria using the blank lids provided. You can either use real objects or cut out and laminate the buttons and socks provided. There are also a number of worksheets which the children can use to demonstrate their understanding of sets of objects. These slowly increase in complexity.