A charity in Jersey is campaigning for it to be made law for children under 16 to wear cycle helmets.
The move is being debated in the House of Commons next month and Andrew Green, from Headway in Jersey, says it should be made compulsory in the island also.
His son suffered brain damage after falling off his bike while not wearing a helmet.
Mr Green says the government can prevent the same thing happening to other young people.
Mr Green said: "A recent publication in one of the medical journals showed a youngster like Christopher having an accident costs the state during their lifetime somewhere in the region of £1m.
"So, apart from all the upset it causes the family, and apart from the life being ruined for that youngster, there are very good financial reasons for the government to bring it in as well."