Mum and dad boss are both insisting that there ds does not need a CARSEAT when I take him out in the car. He is tiny for his age (more 3 year old size) so I'm sure he needs a car seat preferably a high back booster.
In result of them not supplying one I've stopped doing any extra activities with him after school that involve a car journey - which they are not happy about
What can I do to ensure they provide a CARSEAT?