If you are planning to have a gathering that includes a lot of kindergarten kids, perhaps your child's classmates, you had better be prepared to handle the amount of energy they can generate. Children at this age or full of imagination, and are also prone to doing whatever it is that they want whenever they want. They can be a lot of fun, but they can also be a challenge when you have them all together. Ask anyone who has ever taught kindergarten aged children, and they will tell you it is very draining, but also very rewarding at the same time. Make sure you are up for the task and get help so you are not overwhelmed.
One thing to understand when you are going to have a gathering of kindergarten kids is that they are going to have moments when they are going to do what they want. This often leads to a chain reaction. Sometimes, while you may feel aggravated because you have a plan in mind, it is better to go with the flow and see where they want things to go. You should try to relax and see what is getting them so excited. Plan to be flexible and change your entire gathering. They know more about what they like than you do.
That does not mean that you can not get a group of kindergarten kids to have fun with the activities that you plan. What you have to do is to remember that they do not have a long attention span. Group activities are much better than trying to get them to do things one at a time. If you have a line of kindergarten kids waiting for their turn, you are going to have problems. They get restless very quickly, so try to plan things they can all do together and all at once. They will have more fun this way.
At times, you don't have to make big plans to entertain kindergarten kids. They can entertain themselves in the right environment. As long as they have some toys or open space to play, they can usually have fun on their own. You do have to watch to make sure they are safe and happy, however, and be ready to intervene when someone inevitably gets upset by something that someone else has done. Kindergarten kids are fun and open, but they also get their feelings hurt very easily.
Not sure you want to leave kindergarten kids to their own entertainment? Find some activities for them. There are great web sites online that can give you ideas for games to play both inside and out. You can also find crafts and other themed activities for kindergarten kids if you look around. Think about the season and the reason for the event. You probably won't have a lot of trouble finding the perfect thing or things for them to do. Keep gatherings to just a few hours, and keep the sugar to a minimum. The other parents will thank you for it.