Since the mid-1800s, baseball has become identified as our national sport. In the April issue, we see how the game got started, meet some of the biggest stars, and note how the equipment has changed over the years. There also are articles on the Negro Leagues and women players, and we've got some tips on how to collect and care for baseball cards. Think you know baseball nicknames? What about deciphering fun sayings used to describe elements of the game? We've included two activities so you can test your knowledge of these things. Let's play ball!