Breath Training Game for Healthy Lungs
Calmer breathing, stress reduction can be improved with Inhale and exhale exercise. How about playing a game that will teach proper breathing technique.
Using pressures sensors housed inside a ventilated cup to detect breath of air flow, duration, strength, and frequency of inhale and exhale can be measured. Temperature sensor can also detect type of breath - cooler air blowing through nose or hot breath via open mouth.
Data relay through micro-controller with Bluetooth (Arduino 101) to mobile phone or desktop running a Unity game engine. Create a fun game based on breath data where player can match the expanding shrinking balloon. Or blow the virtual horn to strengthen the lungs.
Check out complete project on Hackster.io