FLORIDA IS THE FAVORITE VACATION PLACE IN AMERICA, according to a poll conducted by Holiday Inns asking what state has the largest number of desirable vacation spots. California and Ohio were runners-up. CHILDREN'S FARES TO NEW ZEALAND are as low as their age with Air New Zealand's ``Kid's Play'' package. Passengers traveling on an adult air fare can take one child round trip for just $1 for every year of the child's age, up to 15 years. For more information, contact a travel agent or call Air New Zealand at 1-800-262-1234. CONDOMINIUM SWAPS ARE POSSIBLE for owners who want to exchange condos (but no money) without going through a resort swapping organization. The publication Condo Swap lists locations and descriptions of vacation homes. For details, call 1-800-367-2478. A 24-HOUR RESERVATION NUMBER is now available for any of Best Western International's 3,200 independently owned and operated hotels, motor inns, and resorts in 36 countries: 1-800-528-1234. A POCKET-SIZE CURRENCY CONVERTER by Unicorn 2 is available in US bookstores. It has conversions of exchange rates, world time zones, clothing sizes, and metrics. Call (309) 688-3772 for details.