Some kids things would be cool.
RCT1 had the giant sweets, playing cards for sort of an Alice theme.
Some big cartoon characters
bright colours
big plastic flowers/mushrooms
animals/farm yards
A machinery theme would get used a lot i think
cogs
pipes
scaffolding
engines and turbines
just big industrial looking bits and bobs.
A roman theme wouldn't mean adding much, since we already have pillars and such.
a ruins theme, lots of old broken up walls and stuff.
a dino theme all bones and some animatronic dinos.
an explorer theme, some big monuments and flying machines.
an "avatar" like theme, lots of glowing plants and furniture. All comes alive at night would be EPIC.
carnival theme, clown animatronic, lots of dirty things, tent walls and big tops.
could probably combine a few of those into one
