To help "define" it, visit this LINK but I'll summarize:
The origin of Futsal (Five-a-Side Soccer) can be traced back to Montevideo, Uruguay, in 1930 when Juan Carlos Ceriani devised a five-a-side version of soccer for youth competition in YMCAs. The game is played on basketball-sized courts, both indoors and out without the use of sidewalls.The rules of futsal are a little different than "traditional" soccer, but the point is that it trains new players on the TECHNIQUE and SKILLS of foot skills. Pele played futsal for a few years before he started playing soccer. Plus, they might actually enjoy the very active way the game is played. It is very fast paced and can "turn on the corner," but it is very enjoyable to watch.
I'm so inspired by watching him play, that I am switching over from reffing roller derby to become a futsal ref.