Private land. Make sure its big enough, and that there are not many passing cars that could be hit by cross-fire. Make sure you know that bystanders are far enough away bbs can't get to them, and that you have permission to be on the land and to be airsofting. Make sure no big animals that could be hit, like a dog.
You can do target practice, or you can have an airsoft war with your friends! I have been in an airsoft war and it is very fun!
4 to 6 hours in a airsoft war
Yes
An Airsoft gun
Type recommended by the maker of the airsoft.
No.
None. There is no first airsoft war. Unknown original.
Yes, any airsoft weapon should be lubricated properly.
Airsoftmegastore.com
Yes But A parent has to be with the child and both have safety goglles
Any airsoft supplier should carry these items. A quick search for 'airsoft suppliers' via a search engine should find these for you. You may also find them at retail chains which sell airsoft products, such as Wal Mart.
Yes! Also, many airsoft guns are modelled to look like historical firearms, so historical re-enacting is big with airsoft.