This set includes 6 x 60 piece Multilink Number Tracks sets.​ Use the Number Tracks to develop counting, number concepts, sorting, sequencing, patterning, addition, subtraction and measuring. Each 60 piece set includes 10 linking tracks each 10cm long and numbered 1-100, and 50 sliding pieces made up of 1cm-10cm lengths. Each length has five colours. Stored in a plastic containers. Suitable for ages 4-8 years.