The Virtual Boy is a console that allowed for depth perception through a 3D display using a lens system similar to what we find today in virtual reality headsets. It is possible to recreate this depth effect using two different techniques depending on the type of TV you use.
If your TV is not natively 3D compatible, it is still possible to use anaglyph glasses (the famous red and blue glasses).
If your TV is 3D compatible (whether you have active or passive glasses), it is possible to take advantage of its capabilities to display the Virtual Boy in 3D.
Put on your magnificent glasses, switch your TV to 3D mode and enjoy the joys of 3D gaming.