This is a great activity after reviewing how to estimate irrational square and cube roots. In small groups, students will hang 41 values in order on a clothesline. The 41 values include 5 integers, 10 decimals, 9 fractions, 10 square roots (mostly irrational), pi, and 6 cube roots (3 rational, 3 irrational). The values range between -4.4 and 11. Great exercise in estimation!Answer key included!