Cliff Morgan meets young people with unusual and exciting ways of spending their leisure time.

Nicholas Sack, the 13-year-old managing director, explains the operation of his airline, his bus company and his Greenwich-based holiday and travel agency. Roderick Barron, aged 14, of St Andrews, plays the Scottish pipes among the ruins of the castle near his home. Julian Joseph, aged 13, lives in Sheffield; his hobbies are entomology and conchology.