We can see law of conservation of angular momentum through the game besiege

 We can see law of conservation of angular momentum through the game besiege

 

 

 

 

 

this machine is made up of two spinning parts.

 

 

Inner spping part can revolute by itself.

 

Outer part couldn't do that alone. but  if inner part turn , outerpart will spin to adverse direction.

 

and that is law of conservation of angular momentum. Look at the video.