Sports are a good form of exercise, build team work, enhance dexterity (hand / eye co-ordination) and help character development with respect to winning/loosing.
Then there are spectators that take pleasure from watching the sports. Merchandising, sponsorship etc. etc. etc.
Sports that uses sidelines are baseball, criket, football, soccer and more.
Tiddlywinks
raquassa
All sports.
Archery
Soccer and hockey
well actually sports are very nice including than staying focusing at something or playing games, sports can help your body let your blood circulate giving you energy and muscles which you get strength
hockey it uses a puck
cycling, Motor racing.
I thinkcricket 0-o
where to buy what are they?what do they do how do they work and who uses them
it uses a ball and you have to excise whilst doing it