en matière de précision et equilibre en indoor
http://www.flixxy.com/the-incredible-power-of-concentration-miyoko-shida-g.htm?utm_expid=1298512-20#.UY47jtF8r4Y
http://www.flixxy.com/the-incredible-power-of-concentration-miyoko-shida-g.htm?utm_expid=1298512-20#.UY47jtF8r4Y