6 years & up. Build a chaotic system that never ceases to surprise you! Discover how the power of magnetism causes this pendulum to undergo chaotic motion and keep you guessing what its next move will be with this Koontz™ Chaotic Pendulum kit! Did you know that one of the most familiar types of pendulum is a swing at a playground? Made from durable, lightweight, recyclable cardboard. Includes simple step-by-step instructions and a fun activity booklet. 17 pieces.