ask them not you use their laptops for chatting or net surfing or pc games or playstations...tk dem away..
or restrict the use fr smtym...
if u make them join sm sports forcefully fr a month then belive me they will start liking it 1nce they make frnds thr and strt njoying it...
trst me it will work...
Plus it also depends on what sport u want them to play...
any othr ques. or doubt plz write.. :)
tkcr