Sam Morrison, 18, is a year 11 student at Trinity Grammar who works at Coles while completing his final years at high school and just purchased his first car with his earnings. Picture: Brendan Francis OVERPROTECTIVE parents are wrapping their children in cotton wool by failing to encourage them to have part-time jobs while at school. About 40 per cent of adults do not believe children should combine part-time employment while completing high school, despite experts saying it’s critical to help them learn about money at a young age and prepare for adulthood. Boost Juice…