At about 14 I invented the "Rubberstring Racing Game". You draw a racing track on large piece of paper. And you draw successive vectors on the track using rubbe

At about 14 I invented the "Rubberstring Racing Game". You draw a racing track on large piece of paper. And you draw successive vectors on the track using rubber string as a ruler. The string has a knot in the middle. So you can copy the strength and direction of previous vector by stretching the string from zero to knot and drawing new vector from knot to end. Now here comes the ingenious part: At the end of rubber string is a small piece of cord. You can change this new vector only within this small circle. Obviously if you speed vector is too long, you cannot make sharp turns and vice versa. Capice? The game was a small success. But I also realized that about half of the human population will never learn to play the game. But I wont tell which half.