My first idea was making a conical shaped mouse trap only because it was easier to make than the boxes that most of my classmates did. However, I did make it twice because the first one I made was too small to fit a gold ball, as shown in the picture below.
So I made my second one , as shown in the picture below.
My first idea for my trigger was to make a slider. As the ball goes in, the gravity force of the ball would push the slider to slide into the bottom of the container. The rubber band attached on the container would serve as a lock for the door, preventing it from dropping when my teacher shakes the whole container to test its stability. The picture blow shows my idea.
However, one mistake is made here that I ignores the fact that I cannot manually shut the door. The job should be down by the ball. So I came up with my second idea for the door that I created a door that wants to close it self. As shown in the picture blow. However, it is not enough because the whole thing lacks a trigger. Therefore I added a paperclip that holds the door down. When the ball goes in the container, it would knock out the paperclip and then the door can shut itself. As shown in the picture below.
The project as the whole thing meets the most of the challenge specifications. First it holds the door steadily that the ball did not come out after three-time shaking. It has a trigger that successfully closed the door, as the specifications required. However, the whole thing is not that aesthetically appealing.