Candy Froggie's Lair

Marine, that I've known for hmmm 19 years now (OMG!!!!) will celebrate her 30th birthday next month. And I need help about the purrrfect gift. So far I've no ideas. Marine is not the conventional type so I want to find a very unconventional gift.
So if anyone gets ideas, they'll be ohhh so much welcome! :P

Marine, who's still working and living in London, has invited her closest friends for a birthday Party in London. Frawgs painting London purple for a weekend. I luuuuve the idea, naturally!
The probbie is that we won't be able to go there. SIGH
London is already kewl for partying visitors, but London with Marine is really something!