"Mrs Tan, today John was insubordinate. He has signed 4 extras. So for next 2 weekends you need to bring him to preschool for him to do guard duty. It is ok these things will help train him up so that next time when he goes to NS he will be ready for it".
But......my son John is only 2.5 years old!
"Never too early to start. Will be good for him. Trust me."