For outdoors it is much easier to plan your playground games because you have much more space to work with. Often you will find that children will certainly develop their own entertainment and there own games, however there are periods of boredom where parents have to step in and give some suggestions. The age group and gender will dictate what type of games is going to be most appropriate. You might want to rely on some of the old stand by's that have been around for years, and seem to get handed down from generation to generation. One of the most loved playground games is hide and seek. This is on different levels according to the ages, and for toddlers it's a very simple matter of just hiding a few feet away from them whereas when you get in with the older crowd the area extends significantly.
If you happen to have an area where there is some concrete such as the sidewalk for example, then supplying the kids with a bucket of sidewalk chalk will be most beneficial for entertaining them for a good period of time. This is something that can both be used for both the boys and the girls. However, most often the boys enjoy drawing some pretty complex colorful pictures whereas the girls like to play a good game of hop scotch. If your children are not familiar with some of the classic games then you are going to have to teach them and recall on your memory of what you did as a child.