You should check out the safety before purchasing indoor playground equipment. You can read more at www.alibaba.com/importers/indoor-playground-importer.html
Though there isn't any standard or static dimensions for indoor playground. For your guidance I think 40ft x 100ft would be big enough for carrying indoor playground equipments. I am also adding a relevant link where you can get more information about it.
Go to http://www.answers.com/topic/indoor-playground-kid-s-world?cat=biz-fin
The same safety standards go for indoor and outdoor playground equipment. Outdoor equipment is designed to be more durable.
You should only buy equipment that meets national safety standards. Indoor playground equipment should be padded and supervised at all times.
There are many online stores that offer indoor playground equipment for rent. The NRPA supply chain is one of the recommeded stores in the Wilmington area.
Amusement/Entertainment Industry
yes indoor and outdoor. they have body slides, tube slides, family slides, indoor wave pool, indoor playground, and a whole lot more!
Permits
Permits
yes because anything they touch or breathe on has the swine flu
It all depends on where you live at. In some cites there are permits for the height of the fence, location of ther court, and when you can build it.