1. Zero-gravity bounce! The highest-bouncing ball ever designed. The lightweight zero-gravity foam is the most elastic material on Earth! Well, until you bounce it out of this world. Say goodbye to small rubber balls and old-fashioned pink super balls. 2. Change color in the sun! Take the Waboba Lava Ball outdoors and watch the yellow cracks turn red in the sunlight. The lava ball uses UV color-changing technology and can bounce high. 3. 100% non-toxic! It is of high quality and extremely durable. The Waboba Lava Ball can withstand endless bounces, sports use, and indoor and outdoor games. 4. The perfect gift for any occasion! A bouncing volcano toy! The lava ball is the most fun bouncy ball ever, with a surprising color-changing effect! Loved by toddlers, children, and adults alike. Its size is perfect for stocking stuffers. 5. A fun volcano toy! Ideal for volcano enthusiasts. If you can't visit your favorite volcano, the lava ball makes a great volcanic souvenir gift. 6. It has a size of 65 millimeters.