Here it is: http://s1165.beta.photobucket.com/user/matthew_davids_designs/media/controlgardenoverview.png.html?sort=3&o=3

You use those controls to change the weather and to make it dark. When you make it dark the lights come on in the garden. This is for a museum or theme park - maybe you've seen displays where you can press buttons at museums - this is just a step up from that.

You can make it:
rain
fog
thunder & lightning
snow
ok ELLE, thanks for your opinion

anyone else?
thanks Brendan. Rascal :P