I have a Radwagon being shipped to my house in a few days.  I ordered some accessories from Rad Power but experienced a lot of out-of-stock notices on the site, similar to what others have discussed.

What third party accessories have you found most essential for hauling kiddos? In particular I want something for my 3-y.o. son to hang onto.  I have an Extracycle Hooptie that I want to try to fit, but of course I'm concerned with compatibility.

Also, I saw some comments about getting something for a kids feet to rest on.  Can anyone comment on what works for their smaller kids?