Indoor is considered in many countries throughout the world, especially in Europe and South America to be more suitable for children for the following reasons:
I have heard that in Brazil you are not allowed to play outfield soccer until you are 16. 15 and under are forced to play 'futsal' (a modified indoor soccer, with similar rules to outdoor). I believe the Brazilian Football Federation did this for some of the above reasons.
Indoor soccer
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.
World Indoor Soccer League was created in 1998.
American Indoor Soccer League was created in 2002.
Eastern Indoor Soccer League was created in 1997.
Continental Indoor Soccer League ended in 1997.
Continental Indoor Soccer League was created in 1993.
Klaas De Boer has written: 'Indoor soccer!' -- subject(s): Soccer, Indoor soccer
Canadian Major Indoor Soccer League was created in 2007.
No, I do not want to have your indoor soccer shoes but you can put an ad up online to see if anybody would like to buy your indoor soccer shoes on kijiji or craigslist
Indoor sports are just indoor sports. But if you want to get specific then you might say indoor soccer, indoor tennis, indoor football, etc.