Article: If you want to invent a sport, you'll have to see what kind of balls, rackets or sticks, and goal-type equipment you have. Look around your own house and ask your friends too. Make sure you have enough if each player needs to use their own stick or ball. You might find a golf ball, a baseball bat, a football helmet, and a racket. You don't have to pick up all of the stuff, but at least make a list of what you have. If you have no sports equipment, make a sport that doesn't need any. Use just your body and your environment. Adapt running, hand-to-hand combat, or exercise into a sport. Use non-sports equipment for the game. Look for buckets, brooms, rocks, sticks, chairs, boxes, blankets, or any other household items to somehow use for a sport. Come up with how players score in the game. Have them throw something the farthest, or hit a ball the most times. Make sure you choose if they must reach a certain score, or if whoever has the best score or performance wins. For example, you might have to score the most points to win. You might score by using the racket to hit the golf ball into the helmet from different distances away. The scoring doesn't have to be points. It could be accomplishing a task first, performing a feat best, or doing something the most times. You don't have to make totally new rules for your game, just use the rules of other games you know. Make sure the rules tell players what they have to do and what they are not allowed to do. Combine rules from different sports so they fit together. For example, most sports have boundary lines that players must stay within. If you cross a boundary line, the other player or team takes control of the game. Make rules about players touching each other. Football allows players to make physical contact with regulations about what's acceptable. Yet, baseball has very little contact. Include rules about how to use the equipment, such as kicking the ball in soccer, throwing and catching the ball in football, or tagging the base in baseball. Decide if your game is played one-on-one or with teams, or if it works with either. If there has to be an exact number, make sure you know how many. If the game works with different numbers of players, that will give you more freedom. For example, tennis only works with two players or four players, but basketball works with two to ten or more players. Make sure you have enough space to play. Stay away from buildings and anything else that might get in the way. You'll need room to run around for most sports. Ask your parents before you go away from your house. If you need any type of boundaries or starting lines, use trees or the edge of the grass. If you have cones or rope, use that to set up lines, too.

What is a summary?
Gather up some sports equipment. Describe how the scoring works. Come up with a set rules for your game. Set a number of players who can play. Find an open place to play the sport in.