I can only agree with what Eggy says, but they are very dangerous and unstable and so underpowered that you can be unable to get out of trouble, either hire a car or a proper motorbike,providing you do ride or drive at home, have a full licence for them and take it easy.
Whilst we were in Arillas last year during late June early July an experienced motorcyclist hired a quad, took his wife on the back, he tried to go round a bend up in the hills when a car came the other way and they ended up leaving the road, outcome was one broken foot, mutiple cuts, bruises, doctor and hospital visits, loss of most of their holiday and to cap it all, over £1000 for the writeoff quad and all to pay for because their insurance did not cover it. Another young lady hired a scooter, never ridden one before, visits to the doctor and xrays cost her money but the worst thing for her was the scars that she would have all over her arms and face for a long time, she was not happy.
If you do not have a full licence for a vehicle you are not insured. Pleae take time to read your holiday insurance documents. I know they are boring, but.?.
Please take care, slow down and enjoy life, walking may take longer but it's such a nice way to meet others and it enables you able to do justice to your evening meal and nights entertainment.
walk slowly,enjoy,
Mick.