Solarbabies (1986) on Netflix

In the future, a nuclear war has left the Earth as a desert wasteland where the ocean has dried up leaving the Earth as a vast desert landscape. Most of the water supplies are controlled by the elite corporation E-Protecorate, where the E-Protectcorate takes children away from their families and are forced to live in a orphanage, where they are to be trained as E-Police, the E-Protectcorate's security army led by the cruel commanding officer Grock. After playing a game of Skateball (Hockey on Rollerskates) against their rival team 'The Scorpions'. Daniel, the youngest member of the Solarbabies discovers a glowing orb from another galaxy called Bodahi in a mineshaft and Bodahi heals Daniel's deafness. The Solarbabies learn Bodahi has amazing powers. And the discovery of Bodahi convinces the Solarbabies to escape from the Orphange and fight back against the E-Protectcorate. Pursued by Grock, who is after Bodahi, The Solarbabies travel across the desert wasteland, where Bodhai is the key in their quest to defeat the E-Protectcorate and liberate the world from it's control.