On the plus side, the flat base of the wagon means littles can easily lie down for a nap (and many parents even use it like a bassinet, though technically there's a separate bassinet accessory that's been through all the safety testing and whatnot).

Yes, children can lay down in a WonderFold wagon, but it depends on the specific model and the number of passengers currently in the wagon. The WonderFold W4 (4-seater) and W2 (2-seater) models feature high sides and a deep carriage that allows a toddler or small child to curl up and take a nap on the floor of the wagon once the removable seats are taken out or pushed aside. Many parents in 2026 use a specialized "wagon mattress" or a thick blanket to create a flat, padded sleeping surface for their kids during long days at theme parks or zoos. However, it is important to note that the wagon is not officially marketed as a "bassinet," and children should always be supervised while laying down. If the seats are installed, space is more limited, and a child might only be able to lay down if they are the sole passenger. One of the primary reasons for the WonderFold's massive popularity is this "mobile playpen" versatility, which provides a much more comfortable environment for a tired child to rest compared to a traditional upright stroller, though you must always ensure the "brake" is engaged whenever a child is sleeping inside.