Spider Man Suitcase Scooter
The Captain America by American Tourister For longer trips or when the luggage is larger, having luggage that rolls on wheels is really helpful. You could search for a wheeled backpack that contains additional compartments or get your child a few of packing cubes if they have a lot of little stuff that need to be organized. Check to see that the wheels spin easily and that the luggage won't topple over easily; this may be a source of significant annoyance for toddlers.
You might want to think about purchasing a hybrid design for your child's travel bag, which gives them the choice between a wheeled bag and a backpack, depending on the trip or the age of your child. This provides your child the best of both worlds by allowing them to switch from one mode to another when they are feeling fatigued.