indoor soccer has different soccer cleats and a different kind of ball and has walls around the field and has assfolt and outdoor soccer has a different size ball and kind of ball and has no walls and had natural grass,
I think the difference is in the rubber on the cleats. You can find them on this website www.soccerpro.com/Futsal-Indoor-Soccer-Shoes-c34/. You can also try www.ebay.com.
Indoor games are indoor tennis, soccer, table tennis, volleyball, bowling, basketball, golfing, board games and card games and so on. Outdoor games are basketball, soccer, tennis, cycling, golfing, skating, skipping, skiing and so on.
Indoor shoes and futsal shoes are very similar in fact on soccer.com some indoor shoes are also listed as futsal shoes! However the distinction between them is basically that futsal shoes are more focused on gripping hard, flat and smooth surfaces. On the other hand Indoor shoes are more versatile, they should be able to play on flat surfaces as well as surfaces that are softer such as turf.
There are actually several places for kids in the Chicago area to play indoor soccer. Three examples of facilities that offer youth soccer leagues are Chicago Indoor Sports, Chicago Youth Soccer, and Chicagoland Indoor Soccer.
World Indoor Soccer League ended in 2001.