VR (HTC Vive) game, one player is a baby and has to explore/discover the world through taste, touch and the age old art of throwing things. Spectating players are parents who must transmit their experience without the aid of coherent language.
The baby crawls around (pulling the world by dragging a controller over a floor, much like actual crawling) and tries to understand what they're looking at. Small objects can be examined by picking the up (triggers), licking or eating them, throwing them or hitting them into other things. Once an object is understood it'll be revealed. Large objects can be puzzled out from afar, but they're easier to grasp close up.
The parents watch the baby on a "monitor". Because they can see what the baby is about to interact with, they can try to influence what the baby does - but babies don't speak, so the parents are limited to only using tone and emotion. Parents can only say the word currently on the screen, so try saying it in different ways. This is good practice, especially if you can master sounding stern.
The game ends when the baby either gets too hungry or angry to be remotely civil. At this point the parents are forced to abandon their hopes for a relaxed evening and must intervene instead of just watching the monitor. There's a small chance that your baby might win the game by being happy. This is an illusion, do not hope for it.
Built for HTC Vive, might work with OpenVR roomscale hardware. No guarantees.
Unzip, make sure your Vive is set up and ready to run. Position one player in the Vive and 1 or more players in front of the screen, make sure the Vive player isn't a danger to anyone. Play.
Will work with 1 or 2 controllers.