There are a lot of VR headsets/adaptors on the market today.

 

The lowest cost way to get into VR is generally going to be using your phone and a headset adapter to secure it to your face. There are a variety of these types of headset some like ones made out of cardboard or plastic with foam. Two good examples are pictured below.  

The lowest cost way to get into VR is generally going to be using your phone and a headset adapter to secure it to your face. There are a variety of these types of headset some like ones made out of cardboard or plastic with foam. Two good examples are pictured below.