About this game

Two bumper cars, one red and one blue, sit on a round wooden platform in the middle of the water. After a 3, 2, 1 countdown they start to move. The cars drive by themselves, so each player only has two buttons: hold one to turn left and the other to turn right.

Drive into the other car to knock it towards the edge. Hitting it in the side with the front of your car knocks it furthest. If you crash head on, you both bounce back. A car that goes over the edge sinks with a splash, and the other player gets a point. If both go in at once, nobody does.

After a few seconds the edge starts to creep in, so no round goes on for long. First to 5 wins.

On a phone held upright, Red's buttons are at the bottom and Blue's are at the top, turned round so each player reads their own score from their end. On a wide screen, Red's buttons are at the bottom left and Blue's at the bottom right.

On your own, you play Red against the computer. It goes for your car and tries to stay on the platform, but it is slow to react and doesn't always aim straight, so it can be beaten.

Good for

• Two children sharing one phone or tablet
• Wet play, when the class can't go outside
• A quick game between two finishers at the end of a lesson