When I was a kid in the 80s i remember watching this movie on HBO,  it was about a bunch of kids/teenagers set in kind of an apocolyptic setting, where water was scarce and it didnt rain often, well this one kid finds this sphere like thing thats in some way alive and i remember he found it and the sphere made it rain in the room. At the end i remember some villian having the sphere and trying to like drill through it with lazers or something.