Though it was also true that they looked pretty different in terms of physique than Henry himself, being tall and well built rather than short and scrawny. They were all probably from the same planet as Henry's English teacher, whatever place that was.
He bet Callum never struggled with the fitness test either. Well, of course he wouldn't. They looked at physical parameters as well as mental ones when they selected kids for the program that Henry's father was involved in, after all.