During the first prototype, many ideas had transpired from it. I especially liked the idea of a shaking instrument as it was simple yet it could create a powerful sound. Throughout the second prototype instead of just having one object rattle around inside, I experimented with having two, in which there were two layers, one for the object below and one for a separate object on top of it.

During the planning process for iteration two, I made a lot of changes from the first iteration, one of which is to have a larger container as I planned to have more layers with different sounds coming from each... to make the instrument less chaotic, I decided to add suppressers to each layer therefore I'd be able to theoretically mute a specific layer with the push of a finger. I initially planned to have a spring mechanism inside each suppresser however this was far too complex and I didn't have a lot of time to construct it so I went with a more simple design in which I'd have a flexible material where it springs back when force is inputted and released.

As I stated in the planning process, in order to have a lot of layers in this case four, I would need a larger can, therefore I chose a much taller can to use. Using the can I drilled four aligned holes for the bamboo stick to be inserted (for the suppresser mechanism).

For iteration 2, I initially chose rough cardboard for the base of each layer, however I realised it was too weak so I changed it to a harder cardboard material to keep it more stable especially when there are moving pieces inside, there is a high possibility for the object to dislocate or deform. Through the images the push mechanism can be seen in actual use. There is a flexible transparent piece of plastic that is pushed by the bamboo stick which triggers a push release action. In each layer I put different materials, of which there are wooden pegs in the first layer, rocks in the second layer, a foil ball in the third layer and metal screws on the fourth layer. Each individual section makes it's own unique sounds. 

A big problem with this design as it was is that the bamboo sticks that were to be inserted into the hole were very loose, this meant that it was hard to get the instrument to actually play as the sticks kept getting dislocated which was a huge problem in the function of the instrument. 

To solve the problem in iteration two, realising that the holes were too loose. I decided to add paper straws to slot into the holes, this would help align the bamboo stick to the correct spot when inserted. For this process I had to cut the straw to the perfect length which would allow the instrument to be played without any hindrance to finger movement, as I only needed the part of the straw that was inside the can, I removed all the excess material outside, but before doing so, I had to first super glue it in place so it wouldn't move during the cutting process. 

Another change was made for the bamboo sticks which, after adding the straws, were too thick to be inserted therefore they were thinned down with a cutting knife so that they could slide inside the straw smoothly.

The finished product is done with the bamboo stick fully functioning as it should, the suppressor is working and is able to mute the sound of specific sections properly. The straws are also now barely visible on the surface.

This is the video recording of the instrument. As said before it presents 4 sounds but in addition to that, it also has a subtle sound that comes from the top to enrich the overall sound of the instrument. In the video, all 4 mutes are working however there was still a problem in which the instrument needed to be held with the mutes facing the ceiling for the instrument to work at it's best. This is probably due to how the materials in the instrument roll around and due to their shape, it can be difficult to get them in the right position therefore somewhat jamming the mechanism, but overall it works fine if used right.

The instrument has nails at the top layer which makes a very metallic clang when played.

The bottom layer of the instrument has wooden pegs which makes a dull and soft sound when played.

The centre bottom layer of the instrument has rocks rolling around which makes a much harder and more sharp sound compared to the wooden pegs, however, not as sharp as the nails at the top layer.

The centre top layer of the instrument has a foil ball that rolls around in the space that it gets. Again it's sound is very subtle however it has an interesting sound, in a way similar to the waves in the sea, so I thought the sound was quite interesting and included it in the instrument.