Ran into some art world friends whose 2-year-old son I hadn't seen for a while--they grow so fast!--and the kid was wearing an awesome sweatshirt. It was a classic grey hoodie with "Chinati" spelled across the front in red block letters. Chinati, of course, is the Chinati Foundation, the minimalist art mecca created by the late artist Donald Judd in Marfa (aka B.F.) Texas.
I've got a 10-year old Chinati t-shirt somewhere with the foundation logo [above], which would look sweet on a Onesie--if only they made one.
I don't see the hoodie online, either, but there are sweatshirts for $25. I'm guessing the small would fit a 2-year-old just fine.
Chinati Foundation store [chinati.org]