OM gosh, we exchange everything. For example, I run the annual Ornament Exchange. People who sign up send out an ornament to someone else. Everyone sends and receives, if all play fair. There are sometimes a few glitches, but for the most part, people follow through. So if you signed up to do the Pot Holder exchange, you would send them to whomever the organizer assigned to you and you would also receive some. As far as kids clothes, I think there have been a couple of those in the past, but as I don't have small kids, I would not have paid attention.
If you have a few minutes and want to organize, it is pretty easy. You could start by asking if there is any interest in swapping baby or kid clothes and see what response you get.
I do know there have been kitchen towel and place mat exchanges in the past, as far as household stuff.