This is a special version for vertical windmills. You need less material then the horizontal variant because you dont need to have the hight. You can use the 4 holes to fix the mount tight so the thing doesn't get flying.
Put the kidwind generator in the hole, and lead the wires through the square box.
Use the 4 holes to screw the mounting on a solid surface so the wind doesnt blow it away.
Attach the windblade holder on the generator
Now just design vertical blades and add them to the sticks.
This design requeres this base set : http://www.rhombus.be/contents/nl/p1809_Basic_Turbine_Building_Parts.html to make the entire windmill and a design of vertical wings.