Are the volunteers typically of younger ages? Or do you have mixed groups?

Volunteers were very mixed. At 19 I was the youngest, but ages ranged all the way up their 60s. Older volunteers do have a tendency to live independently though, so it's mostly a younger crowd living in the provided accommodation (eldest in the house was 31 while I was there).

It generally is a mixed age group ranging from 19 even up to 70. The majority are in their 20's and 30's. Age is irrelevant. Generally the younger ones live in the volunteer house whilst the over 30's to 60's live independently in their own apartments. Everyone seems to get on. We are all young at heart.