Trade fairs aren't usually fun. But that's not true at the iaapa, a conference and trade show for the amusement park business. This year, there are about 1,300 companies at the iaapa. The show, from november 15th-20th,is at the georgia world congress center, atlanta. It's only open to professionals. There are thousands of products on exhibition, some of them enormous-including rollercoasters. The site is huge: 60,000 square metres, with indoor and outdoor areas.