Mad as a Hatter you say?

My darling Ali shall be turning 21 in a matter of weeks, and in order to celebrate it is having an 'Ali's in Wonderland' theme.
I am the laziest person when it comes to dressing up, love the idea, but when it comes down to it, I'd rather sit on my arse to be honest. As it's Ali though I am going to make an honest effort, so I need some tips. I plan to dress up as The Mad Hatter, sure as Ger says I am a Mad Hatter, so it only makes sense. Any tips or advice would be gratefully received.
Sizzy.