These plastic counters are great tools for developing fine motor skills, sorting, classifying, counting, patterning, measurement concepts and creating sequences. Set of 42 counters in 7 shapes (crab, lobster, octopus, seahorse, starfish, turtle & stingray) and 6 colors (red, yellow, orange, blue, green & purple), 1 tweezer and activity guide--all in a convenient plastic jar with handle. For reference, octopus measures 2" x .75". For ages 3 and up