The subjects in the art class at school were always different from year to year. My brother once had to do a sculpture out of the material Eton, which is normally used to built houses with. This material is very good for thermal insulation. Since he is 3 years older I was waiting for that subject to come up in my art lesson. Unfortunately, it wasn’t so I bought an Eton myself and just started working on it. It was great fun and hopefully I will manage to do another one some day.