Aardvark is a framework for building augmented reality "gadgets" that run on top of virtual reality experiences. Gadgets are constructed using a bunch of custom React components (from the @aardvarkxr/aardvark-react package) and run in the Aardvark application. Gadgets use these components to show interactive models, 2D UI, or other stuff that will draw on top of any VR applications you run. You can attach these gadgets to your hands and bring them with you in your favorite VR apps. If you just want to make gadgets, your best bet is to use a released build. Just download and run the latest released installer, then run aardvarkxr.exe from the install directory. Once you've installed you can also enable Aardvark to start automatically in the Startup/Shutdown settings in SteamVR. Aardvark is made up of "gadgets". These are 3D objects that do something useful, something fun, or maybe they just look cool.