To make a bouncy ball you combine a sodium borax and water mixture with regular school glue. The proportion of these elements are crucial to how the bouncy ball you create will turn out. First, my group started with 14 grams of glue and added 4mL of the borax and water mixture (which contained 10 grams of borax and 75 mL of water). This bouncy ball had nice form and did not flatten out when set down on the table. We then thought that the glue was the element to increase to get the highest bounce to our ball. We then added 15 grams of glue with 5mL of the borax mixture to try and make a close match to the first product we created. We decided the second ball bounced a little better so we decided to make the final balls with 16.4 grams of glue and 5 mL of the borax mixture to increase the glue slightly hoping that the elasticity would drive the ball higher when bounced. Our method was to increase the glue as much as possible without the ball being sticky or losing form. What we did not think of was the mass of the bouncy ball. Our bouncy balls weighed in at around 16 grams each and if we would have decreased the mass, the result might have been achieving a higher height when bounced. Good properties of a bouncy ball may include a smooth texture which ours somewhat achieved. The texture of our bouncy ball was slightly wrinkly, however it did not lose its shape which is also a good quality to obtain. The best portion of ingredients was the high glue to borax mixture ratio, but a small mass. These portions matter because it affects the shape and form of the bouncy ball, meaning it kept its shape. If there was too much borax mixture the ball would most likely sag or flatten once set down. The ratio is also important because it determines how high it will bounce which was the initial goal set. Trial and error was key to this experiment. We made many prototype balls before we decided to go with a final. Trial and error is a good method to go with because when you only have a suggested group of proportions you are left with wiggle room to experiment which elements will help you achieve your goal with a better bouncy ball. When you are mixing the ingredients and making the balls you can identify which method is going to work and you can tweak it so that you create a new and improved bouncy ball that can bounce higher with the lesser mass. This is an important matter because you can innovate upon the previous prototypes that were weaker and did not suffice compared to the final bouncy ball.