If you're looking for an excuse to play in the sun, the Lava ball is it. Take it outside and watch the yellow cracks erupt to red in the sun. The Lava ball features UV color changing technology, not to mention it bounces sky high! Hyper bouncing ball Bounces sky-high Yellow changes to red in the sun Size: 63mm / 2.48 in There are several styles and colours available within this assortment and unfortunately it is not possible to request which one you would prefer