you could name a playground after some one or you could name it after some thing in the area (i.e. rosebud park, Margret E. White playground) . Hope this helps!!
Rocki Roads is the brunette pigtail girl in the Digital Playground ad. Another brunette on Digital Playground is Tera Patrick.
Kickball or tag
It would only be proper if it was the name of place. If it was the name of the restaraunt, like Playground Bar and Grill, it would be a proper noun. If you are just going to the playground down the street, it would be a plain old common noun. This is usually the case.
The Playground Kidders are the playground kidders
www.allplaydoesitall.com has customizable playground equipment. au.dir.yahoo.com/Business.../Playground_Equipment has a listing of business specializing in this field. You can get customized park playground equipment at www.allplaydoesitall.com. Another good website is www.equipment.net/list/playgroundequipment.htm.