Traditionally in the Netherlands this is called a Bolderkar, and the more usual of them are basically a very simple wooden wagon-with-four-wheels type arrangement. ( Think of a bakfiets without the fiets!) ( a Cargo bike without the bike!) The old fashioned arrangement was/is simply a small cart, without seats and small children or small loads could be pulled along in them for easy transportation. Other than calling this a ” wagon” which seems to not really give a clue to the small(ish) size that this is in reality, in English the closest I could call it might maybe be a ” walking bus”?. Our crèche (daycare) uses this one to take small groups of children and babies to local outings, taking very small groups of babies, toddlers and tots to the local swimming pool, kinderboerderij ( a kinderboerderij is a miniature children’s farm with sheep, goats, chickens etc in the cities so that city kids can see the workings of a farm on a very small scale and get to see real animals). I think that it’s an excellent idea and another great way to avoid the constant use of cars. This one is ultra modern and is fitted with seats and seat belts for safe transportation of the children. My son loves going for a ride in this !