There are plenty of interesting VR games available these days. If you are looking for an educational game, you may want to give Stars for HTC Vive a look. It teaches you a thing or two about the stars. You can look up at the sky to listen to the story of each constellation.
This is an early access game at this time, so more features will be added in the future. The game costs $5.99 at this time.
[Source]