They already need a licence, they are motorbikes, you need at least a provisional licence and CBT to ride one, the bike has to be insured to be on the road legally.
So in both cases the boys were criminals because they were riding bikes without insurance, without licences, without helmets and in one case they had a passenger.
You cannot carry a passenger on a provisional licence.
Where are these parents getting the money? PPs say that these bikes are worth £5k, I never had presents of that sort of value when I was a kid.
One person gets it on HP, then they sell it on when they need some cash. It then gets sold again.
I live in an area with a particular regulation, I was astounded at the presents some children get, they cost a fortune, but they often end up in cash converters a few months later. Having said that most of the people here are lovely honest hard working people, but there are a few who are not.
Your parents probably never pawned your presents.