A few years ago, I got the bright idea that a normal collapsible dolly would work just as well as a dedicated car seat dolly

What a wonderful idea

This is a handy idea and one I had to try out after seeing another parent use this in the airport

All in all, this is a very good idea but just needs some tweaks to get this cart to be a little more universal in terms of how many car seats it can comfortably support.