This page shows the construction of the wings. That includes the main spars, rear spars, ribs, wing skins, flaps, ailerons and several other little things that goes into aircraft wings. And yes, there are two, so we get to do this exercise twice. With the exception of a few details, most of the pictures here are from the construction of the L/H wing.
The Sonex is designed with detachable wings. Among other things, this allows for easy transportation and storage. It also allows the builder to finish one item, store it and move on to the next. You really don't need a big workshop to complete a Sonex.