We bought ds1 a Fireman Sam small wheeled case with the idea of him being able to use it for overnight stays and also as hand luggage for holidays, but it's just a bit too big for use as hand luggage.
Can anyone recommend a wheeled rucksack for a 4 year old boy that will be accepted as hand luggage but still fit in comics for example without them having to be folded or getting too crumpled (so at least A4 size).