My entry: a waltzer ride.
Edit: I just realized I had to say how I modelled it, so here goes:
First I made one of the seat thingies-
# Added a cylinder
#Cut some stuff out of it (loop cut, delete etc.) to give it the opening and stuff.
#cut some loops in it and filled them to make a seat.
#tweaked verts to get the shape right.
#made the base of the handle bar thing from a bevelled square, a cube, and a cylinder.
#made the handlebar out of an extruded circle.
Then I made the bit the car things go on, by
#adding a 12 sided circle, extruding (individual) faces etc., then
#used proportional edit to get the whole wavy thing going on.
The base was really just a continuation of that., with loops cut out to extrude the stairs from.
The roof was a circle, extruded to give the right shape, quite basic there.
The text was put on with a curve to get it to fit to the shape of the roof
The fencing was made with curves.
The kiosk bit is just a 6 sided circle with holes cut in for windows/door etc.
The lightbulbs that are all over it are a uvsphere (extruded a bit) and a simple cube.
I think that's everything....