Surprise 40th Birthday Pary

I would like guests to bring about £30.00 per couple, and single £15.00 for my husbands surprise 40th Birhday Party.
An Aston Martin is his dream car and I`m hiring one for his birthday. It would be a dream come true for him to actually drive one himself, and would mean more to him than other gift.

How can I word this on the invitations?

Cheers
Laka Boardman
Posted by Laka Boardman; updated 02/23/06