Also coming to Cleveland at the Great Lakes Science Center in April will be "Baseball as America," the traveling exhibit from the National Baseball Hall of Fame and Museum in Cooperstown, N.Y.

The exhibit, which will run from April 17 through Sept. 3, is the first show to examine the relationship between baseball and American culture.

The national tour began in New York City in 2002 and originally was supposed to go to 10 cities, but it was extended last year because of its popularity.

It already has been attended by more than 2 million visitors, more than double its reach to audiences in Cooperstown.

Among the more than 500 artifacts in the exhibit are the "Doubleday Ball," supposedly from baseball's first game in 1839, Coopertown's most sacred relic.

There's the Honus Wagner T206 baseball card of 1909, the world's most prized baseball card, and Norman Rockwell's classic painting "The Three Umpires."

Equipment artifacts include bats used by Babe Ruth, Roger Maris and Mark McGwire to break the single-season home record.

Travel editor David Bear discussed this show when he visited the Greenfield Village at the Henry Ford Museum in Dearborn, Mich., last year ("Henry Ford Museum and Greenfield Village pay tribute to American experience," July 23, 2006.

For more information on the exhibit in Cleveland, call 1-216-694-2000 or go to www.glsc.org.