Play Ball!

Sports Tours Inc. wants to take you out to the ball game -- four of them, in fact, in four different ballparks over one long weekend. "Ultimate Baseball Road Trips" are available in the Northeast, the Midwest and on the West Coast, for about $575 a person, based on double occupancy, including accommodations and travel between cities by bus. Trips can be custom-designed for groups of 40 or more. For details: 1-800-722-7701. Medical Care in Moscow

Open wide and say "Da ... " International Health Care is a new medical clinic for foreign citizens and travelers in Moscow. The clinic, whose address is Korpus 2, 3 Gruzinsky, is staffed between 9 a.m. and 6 p.m. daily by two physicians and several nurses. It's a joint effort of Europ Assistance, a travel assistance organization; Polyclinic No. 6, an established Moscow medical service; and Intourservice, a branch of Intourist. For information: Travel Assistance International, 347-2025 or 1-800-821-2828. Taking Aim at Art

"The Traveler's Guide to Museum Exhibitions" lists hundreds of exhibits at dozens of museums countrywide and in Canada. The 1990 guide is available for $9.95 from Museum Guide Publications, P.O. Box 25369, Washington, D.C. 20007, 338-1500. TRAVEL TRIVIA

What state is at the geographic center of the conterminous United States? ANSWER BELOW TRIVIA ANSWER: KANSAS TOURING TIDBITS

Custom-designed, seven-day tours of the French Alps are offered weekly May 13 through mid-October. Each tour is limited to five participants, whose interests determine the activities; the cost is $990 for adults, $650 for children 2 to 12 years, exclusive of air fare. For details: Joie de France, 1-800-992-5643. FREE (OR ALMOST) FOR THE ASKING

Dozens of free and low-priced federal publications -- including maps and guides to national parks, forests and wildlife refuges -- are detailed in the Consumer Information Catalog, which is available free from Consumer Information Catalog, Pueblo, Colo. 81009.