EA Maxis has released the Amusement Park DLC for SimCity, allowing you to customise a fun park and generate cash at the same time.
From videos we've seen the Amusement Park can get pretty big, which makes us wonder how you'll even manage to fit it in your city. Perhaps the idea is to start a new smaller city and link it up with your main one?
Anyway, you can pick the DLC up for 7.99 GBP in the UK, so if you fancy some Theme Park building then go for it.
You can read more about the DLC here.