In order to play any sport, you need some kind of equipment. Whether it is a uniform or a helmet, you need to have some (though you have the possibility to play some sports with out anything, like running, if you wanted to, you could run without the need of anything.)
Bat
Baseball
This is a baseball bat. It is one of the most basic pieces of equipment. It can be made of wood or a metal like aluminum. It is used to hit the ball after it has been pitched by the pitcher. This is a baseball. It is they most important piece of equipment. Without it, there is no game.
Baseball helmet
Baseball Glove
This is a baseball helmet. You only wear this when batting, but you actually don't need it to play baseball. It is a good idea to have one when you have a baseball thrown at you at high speeds. This is like a "just in case" piece of equipment. This is a baseball glove. It is used to catch the ball. There are three types, the catchers glove, the first baseman glove, and the standard glove. The first baseman's glove is longer, wider, and has no individual fingers. This helps it to catch more wild throws to first base. The catchers glove has extra thick padding, the last three fingers are all in one finger slot designed for it, with the index finger getting its own slot. The outer brim of the fingers (excluding the net) are super thick. This is so that when the ball is pitched to him, it won't bounce out of the glove because the padding makes a wall trapping the ball.