Physics to the rescue

My eldest granddaughter loves engineering and physics,yesterday when I spoke to DrDemayabout my recovery he says he is trying to work on something so that the nurses wld not have to bring me a continual change of ice packs.  

C thought that this cld b an interesting robotics project.  I am to ask what the temperature should me maintained at..the trick wld be get tubing that wld not crack,a small enough refrigeration unit to be efficient

Anyhow two lively minds are going to take a look at the problem

Right at the momentum granddaughter is working on a robotic sumo wrestler!