A baseball game is played with 2 competing teams, each having 9 players in the field. The batting (hitting) team plays offense while the fielding (pitching) team goes on defense. They take turns in batting -- with the visiting team normally the first -- and when each team has had their chance to play offense, it is what we call an inning. One game usually consists of 9 innings but can have extra if there is the score is draw by the end of the ninth one.
Winning is determined by the number of points or runs made by the teams -- the one with the most number of runs is the winner.
The goal of the batting team (offense) is to score as many runs as possible by hitting the ball thrown by the pitcher and running across the 4 bases around the field (diamond). On the other hand, the fielding team (defense) will try to ‘out’ players of the batting team by various means ergo preventing any runs. Once 3 outs have been made, the fielding team will take its turn to bat while the batting team takes defense.
The essential equipment in playing baseball are the bat, the glove (mitt) and the ball. The bat is used by the batting team to hit the ball thrown by the pitcher, made of a solid piece of wood. The fielding team uses the gloves made of leather in order to catch the ball while the ball itself is made of yarn wound around a small rubber core and then covered with hide.
Source Link: http://hendrengroup.me/blog/basics/