Learning Resources Colourful Cactus Counters. Inspired by the desert, these Colourful Cactus Counters help children master essential early years math skills. Teachers can use these fun counters for an array of maths activities including counting, patterning, sorting, ordering numbers, teaching place value, cardinality, subitising, addition, subtraction, and more. This set of 72 has 6 different cacti each in 6 different colours. The counters are made from high-quality, durable plastic and add a tactile element to maths learning that children will enjoy using. The counters are easy to clean and store in the reusable plastic tote that has a handle on the lid. The set of 72 counters also comes with an Activity Guide with teacher-created activities ideal for the classroom. Suitable for ages 3+