Brainstorming.. still..

Well, I was thinking about some ways to manage my midterm idea. The red seatings at the lab were my target at the beginning. So when someone sits on them, lights will turn on towards them to give a feeling that they are on stage. When sitting there, you can see almost every part of the lab, but with this idea this time the seated person will be on stage, turn into a spectacle and so on..
As I went on thinking, I planned to put these traps all over the lab, but figured that it's going to take a lot of time and knowledge.
So I shifted to another idea. Still focusing on a physical project, I decided to have a kind of instrument:
Here we have a grid of 12 boxes with buttons/sensors in it. They are covered with some kind of paper or maybe soft fabric to give a feeling of a drum. When hit/waved/pressed, the box with make a sound. As every box has its' own sound, but the problem is I'm not sure what kind of sound they should have.
Oh and also every row will have a certain beat going on. Let's say we have a "hey!" sound on the first row; when interacted once the sound will go "hey! hey! hey! hey!".
So I'm thinking about a beatbox now.. but my mind is changing all the time. ARGH!!