Standing just outside the center ring at the Richmond Coliseum, Kimberly Drudge was as eager as any child to share details of her circus experience. The 7-year-old said the clowns were funny. The long-haired dog was pretty. And Asia, the 8,000-pound star of the latest Ringling Bros. and Barnum & Bailey production, was wrinkly. The descriptions ring true with circus fans of all ages. Being able to relate to them through hands-on experience, however, meant even more to 32 visually impaired Virginia students like Kimberly who got a chance to see the circus their way yesterday.