Super simple, just cut out the three pieces.  The flexible side will take a while but it is so neat that a board can be flexible with some cutting done to it.

Start assembling with the bottom piece and the flexible side.  I found it easiest to start on the slat the was the widest and then circle around sliding the slats into each of the holes on the bottom piece. When you get to the start two slats go in largest hole. This is designed for there to be little legs under the bottom plate.  If you do not want these you can shorten the legs before cutting.  You may want to put glue on the slats before inserting but I found it was pretty tight without.  Once you have the bottom all on then you will continue with the top piece that also has the slots.  You will then add glue to the the tops of the slats that poke up above the top slotted ring.  Now attach the solid circle ring.  Again if you do not like the little addition you can shorten the slat before cutting, I think it adds a little more detail.  

This can be used in many different ways.  Hope you love this!