If you want to test your powers of observation, try going through all the levels of the new online game Find The Ball. In it we invite you to play thimbles. Three glasses will be visible on the screen in front of you. Under one of them you will see a ball. At the signal, the cups will begin to move across the playing field, confusing you. Then they will stop. You will have to click one of the cups with a mouse click. It will rise and if there is a ball under it, you will be awarded points for winning in the Find The Ball game. If the ball is not there, you will lose the round.
