A fun ping pong game that can be played online is called Ping Pong, which is available at miniclip.com. The mouse is used to control the paddle for this game. The object of the game is to bounce the ball on the paddle as many times as possible.
Another online ping pong game is Ping Pong 3D at agame.com. This is a free Flash-based game. The player uses their mouse to act as the ping pong paddle. They move it around their side of table to try and hit the ball. The score for each game is available on the right side of the screen.