the only thing that I'd take my kids (if I have kids that is) is simply the Dutch cargo bikes, sure expensive at a grands but it something I'd rather get if I have kids.
I kept seeing them around in Bloomsbury quite regularly it has to be said.
i have seen one of those (red i think) chained up in ucl for few times
i have seen one of those (red i think) chained up in ucl for few times