Glowing green Gertie Ball can be charged by any light, then glows in the dark for up to one full hour. Just keep this Gertie ball in the light for a few minutes. Then turn off the lights and watch it radiate a bright glow! Every child will be fascinated! Colors will vary -- sorry, no choices. What makes a Gertie ball so wonderful? It's the soft, squishy, huggable feel! These Gertie balls have a unique, slightly-sticky surface that makes them extra easy to throw and catch - even for the youngest kids. Simply inflate the balls to the desired size and skill level. Whether they are full and bounce or soft and squeezable, Gertie balls are always light and gentle, for both indoor and outdoor play. And it's the only ball that travels small! Deflate flat for easy packing, and then re-inflate quickly with the included straw. All ages.