This pack of 24 Zometool Challenge cards are and easy-to-follow plan for organizing and conducting a 2-hour Zometool workshop or multi-session classroom activities. The cards are divided in various sections/session, each with a color code: Educator's Notes, Challenge Rules, Workshop Schedule, Shape & Number, Symmetry & Tilings, Fibonnacci & Tau, and Green Lines. Each card is illustrated and offers a challenge question, plus a bonus question for advanced learners ... a great, low-cost introduction to the nearly infinite educational possibilities of the Zometool system. The cards are packaged at the factory in Ziploc container for easy resealing.