I've seen other folks mention that they would like a fair and I agree. An carnival would help wonders in getting my novel written

What should be included in the theme:
A carousel (a proper one with horses or animals to ride on). I do have both the swing carousel and the Christmas sleigh carousel, but a carousel/merry-go-round would be fabulous - even better if organ music can also be played.
Other rides too. That giant slide, perhaps?
Booths for food and midway games. (The Christmas Market is a step in the right direction).
Reissue the Japanese roller coaster set

Re-release the horse tent from the Romani series - would be useful as a tent for an animal menagerie.
And while we are at it, re-release the Romani trailers - especially the strongman/weight-lifters one.
Trying to think of what rides would work/be compact enough to fit in a medium-sized set...
The jazz quartet from the Romani circus set would work in this theme as well (as well as several themes, now I think of it).