The planetary Nasa Stress Balls are so fun & easy to play around with. These planet inspired stress balls are a great gift for those space enthusiasts with fidgety fingers! Collect all 3 planets Mars, Earth & The Moon. They are great for relieving stress among adults but also great for children to help their busy hands! Each purchase of the stress balls are selected & sent at random. We cannot guarantee you will not receive duplicate when ordering more than 1 of this item.