"Chance Encounters"

Our game called "Twister" was made with: a card board box, multicoloured tissue paper, 3 big empty Spa bottles, one small empty Spa bottle, masking tape, duct tape, 2 rulers, and 4 marbles.

How we made it. In stage 1 we cut the bottom of two Spa bottles and with the last one cut off the top and the bottom. Then we put the Spa bottles into each other and duck tape them together. When we did that we took the top of the Spa bottle piece and duck tape that as well. After that you take a small Spa bottle and cut off the end of that, then my partner Davis held the small Spa bottle halfway in the big end of the tube and the other part of the small Spa bottle was sticking out, then we taped it.

Now on Stage 2 where we used a box and the long tube thing. First of all we put the long tube thing against the side of the box, and then took a ruler and put it so it would hold the long tube to the box, then we masked it together but it was still leaning a bit so we took a second ruler and masked that as well and it helped a lot.

In stage 3 all we had to do were the details. So we took some titue paper and glued it in and outside of the box and then wrote the name in. This is our design of the game:

The rules are:
1. Drop a marble down the top of the long tube.
2. If the marble goes down the long part of the tube you win and gain a point and if it Just falls through you lose and do not gain a point.
3. The most important rule of all is to have fun.

The percentage for our game was 50% but when the other Kids were playing we both said to each other that it was more 75%. At the end it turned to be 69% of wins and 31% of loses so we did not figure out the percentage correctly.

Two hundred forty-four children and same adults included played our qame, Twister; 169 of them won and 75 lost. The experimental probability of winning was 69% and the experimental probabitily of losing was 31%. Our game was supposed to haue a 50 / 50 chance of winning. The game became not a 50 / 50 because if you tilted it forward you would usually win and if you tilted it backwards you would usually win. It wasn't perfectly balanced so it became more of 75% chance of winning and not 50%. We tried to balance the tube but it wasn't easy. Some people tried to cheat and some succeeded but others failed. I think our game turned out to be a success.

The object of Twister is to get the marble to go down the longer way and not the shorter way. If you get the marble through the longer way you win and gain 1 point. If your marble goes down the short way you lose and do not gain a point. The directions are to: 1: drop the marble into the hole that is located at the top of the tube. 2: watch the marble spin and slide down the tube. 3: observe which way the marble goes. 4: mark off on your card if you won or lost.