At first, I made the box that should contain the aluminum can and steel can when the experiment goes. I brought a big one foam from the back side of the class and started to draw and cut down the rectangle shape foam. I was planning to make 5 pieces of rectangle shape foam. I thought it would take no more extended 20 minutes to glue all the foams and rest of the time; I should start planning how to make a slope. However, it took me 30 minutes to cut only two pieces. I was confused that it took so long than I expected. Therefore, I hurried up, and eventually, I cut five pieces with width 5cm, length 18cm and glued them at the end of the class. When I finished attaching the rectangle shape of foams, the width and height were not equal. Therefore as the solution, I handle some width to match correctly.
By the 3rd period, I finished my box handling and started to plan how to make the slope. I was considering to make the hill as ‘Cycloid.’Cycloid is the curve traced by a point on the rim of a circular wheel as the wheel rolls along a straight line without slipping. It is known as it is the fastest line including straight line and curve line. I thought by using straight line and curve line, and it should make a good result for the invention experiment. Therefore, I determined to use the cycloid line. However, there was a big problem. I don’t know how to draw it. To solve the problem, at first, I tried to make cycloid with the program called ‘GeoGebra.’ At the starting point, it worked well, but it suddenly does not work and failed. I was worried that I couldn’t make the slope of the invention. The hill was the most critical part of my toy. Without slope, my device could not work. I thought and thought to make the solution. And then, I came up with the idea. I figured out by bringing up the cycloid picture and draw the same line. I printed and drew the cycloid. I wanted to sketch in the foam so that I could construct, but there was not enough space in the foam to make. Therefore, I made the slope with brown cardboard. This material worked well than I thought. It was more convenient to handle. I cut and paste like the picture (below the text), and it was completed.
I connected the slope and the box. I glued them together so that it will not become separate or fallen off on the ground. As I pasted, I did the first experiment with the invention. In the first try, I worked. I was so happy. However, There was a little problem, after the test, I did several times, but there were sometimes the result go wrong. For example, the can went outside the box by having more velocity. It should lend inside the box. To prevent this situation, I made the latest foam box a little higher than the front rectangle shape of the box. And then it worked. The theory was aluminum can doesn’t get influenced by the magnet, so it gets faster and goes into the box and steel can get slower by the magnetic field so that it drops near the invention. I bought some bar magnets from the market to reduce the velocity of the steel can. At school, there was a magnet that shaped circle, but I thought it was too strong so that the steel can stop in the point where I put the magnet. When I attached the bar magnet to the invention, it was not as strong as I thought. I was confused so I put 2 bar magnets the center of the gravity changed and it became unstable. Therefore, I used some magnets look like a circle, and it worked. When I did my experiment with my invention, it was successful.
Until the 4th period I was fixing and making solutions all the time by occurring problems like error results and lack of materials that I was supposed to need for my device. After my invention improved, I showed to my friends and even my family. There were lots of opinions about the invention, but the most common feedback has developed the design. The brown cardboard was too simple to attract the kids. They also complained to me decorate a toy. Accepting the opinions, I determined to left school to improve my invention’s weakness.
After School Period
I stayed after school to improve my invention. I decided to write some familiar topics for children. I wrote Zoo, Welcome, Animal Kingdom. Thanks to Mr. Torigo teacher and my friends, they recommended for me colors that looks good on the letters. I sketched on the bottom of the box with blue and green so that we could divide grassland and sea. I also draw some animal faces in the cans like dolphins, shark, lion, and octopus. (Saying again, this is for children) Eventually, the experiment result was succeeded and my invention’s weakness, the design had improved. I’m satisfied with my invention.