Go on a boat ride
Have a vintage tea party
Host a barn dance. They're so much fun and will have everyone up dancing and laughing their heads off.
Put up a 60's themed party
Hire a look-alike celebrity for the day
Have a disco or a live band
Do a once in a life time thing (something you'll never forget) think big and go wild!
Check out the world of the odd and bizarre at Ripleys Believe it or Not!
Put up photographs of the person whos birthday it is around the room
Go on a Superbreak. You can choose an attraction to go to and get a lovely nights accommodation to go with it