Entertainment for Company Anniversary

I am organising a party for our staff and some guests (approx 35 people) to commemorate 35 years in business on 11th July 2008 from 3pm to 7.00pm. I have been given a pitiful budget by our md but I would really like to lay on some sort of entertainment lasting for about an hour of the event. I'd prefer not to have a disco, a hypnotist or a magician. Can any one offer an unusual idea at a bargain price?