You can Play Pile of Balls Online which is a Match 4 Game at Friv for Schools. There are balls falling from the upper side of the game screen. Your aim is to match 4 or more games of the same colour to earn points. You can Use left or right key to move the pack of balls, Up and Down arrow key to rotate and Spacebar to speedy fall of the balls. Picture math is also a free game. Play muted.