I tried to approach the idea to make it more amusing rather than to make it a traditional tone-responsive system as you can find in medical instruments.
That’s why I combined the chair with air pomp to inflate the balloon when user sits in a wrong position.
For the reward, if they sit in a right position, the balloon is going to deflate.
How am I going to measure the right and the wrong sitting posture?
I am going to put distance detector back of the chair. In the way, I can measure the users’ distance with using arduino.
The motivation: Users won’t know when the ballon is gonna blow up, in that way they will be forced to keep the their posture in a right way.