Unfeasibly funny sequel to the popular Impossible Parents - part of the Sprinters series relaunch Poor Ben and Mary Norm. Their parents have decided to become ecologists and are getting it impossibly wrong. First they ditch their clothes, then the TV and now they're eating yak cheese! Worst of all, the kids at school have found out, and Ben and Mary are a laughing stock...again! If only their parents could go back to being normally impossible, rather than ecologically impossible. But then Mary has an idea that might just work...