jtpr writes:

I want to build a couple of these for my wife's garden:

http://picasaweb.google.com/lh/photo...eat=directlink

I can't quite figure out how I could get the curvy sides though. Any
suggestions?

You could cut them with a bandsaw out of rough wood.

It would be easier if you had a piece of solid wood (from glued up
pieces) cut it like a bandsaw box. I suspect this was done because the
wood was painted.