We bought a folding wagon for West and the pups about a year ago, and we still receive numerous inquires about it. As such, here's a quick review with photos and product links. I would've loved to buy a previously-owned / vintage wagon, but this one navigates smoothly over wretchedly-paved roads or natural ground, is washable, and is practical for a compact home or apartment. As such, it was the right fit for our needs. We routinely use ours to wheel around our son, his friends, the pups, plants, groceries, and medium/large boxes.
We selected a version of the Wonderfold that comes with telescoping corners for an optional sun canopy, and I'm so glad we did. It takes about 15 seconds to apply or remove the canopy, and it functions perfectly for bright, hot days. We also added a safety seat for West when he was a bit smaller. It kept him upright, safely harnessed, and prevented him from knocking his head into the wagon's frame. (Another optional add-on is a mosquito net.)
Most importantly, the entire wagon folds up or expands within a couple seconds, making it practical for multi-tasking folks in confined living quarters. (It also fits easily into small trunks when collapsed.)
Conveniently, the handle of the wagon doesn't crash to the ground when you release it-- it either stays put, or very slowly lowers, depending on how forcefully you release it.
It's easy to remove the canvas of the wagon for machine washing. (I simply hang-dry the material before reinstalling it.) Ease of washing was important to me, because West regularly draws on the fabric with chalk, the pups shed on everything, and I somehow always manage to get sap and floral water all over the interior.
I hope this helps. Here's to tiny adventures beyond our homes!