If your wanting your son to do some driving while in Corfu then check the age limit on driving thats been mentioned on here as Corfu have different laws to us.
I must also point out that your son will need to take his driving licence and show it to the hire company where your getting the car from as they need to know who is driving there cars.
You will also need to check your Holiday Insurance as to whether car accidents are covered by the company.(Not that am saying your going to be involved in a accident,just to be on the safe side ok).
A Hint While Driving:
If your out on a hot day and your about to go up a steep hill,like coming up the hill from Taverna Agni,then make sure you turn off your air conditioning as this really slows you down and you may not get up the hill if you don't turn it off.
If You Are Hiring Scooters:
Please be aware of Pot Holes in the roads while driving around as these can cause an accident or an injury to yourself.Be on the lookout.
Hope this Helps.