Knock down games are also called Coconut Shy games. They can be played at home by stacking boxes or empty cans that must be knocked down with a ball.
These games are very present in the fairs, in which you can win prizes if you make all fall in one shot.
In online knock down games, the principle remains the same. You should measure your strength to throw the ball in the right places and to cause maximum damages. In some games, there is a limited number of tries and you have to becareful not to waste them.