I would use a fine tip, regular run of the mill, Sharpie. The ultra fine tip would be too small and not hold up as long.
sharpie
a soccer ball
It is a practice type ball
Yes.
square
A bumpy surface
oxygen air
turf grass
You can order a soccer on E-bay, Nike.com, Adidas.com,or you could type this in on Bing.com and get more suggestions.
go to Google and type "soccer"
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quadratic
Through ball is a type of pass in soccer which may be played along the ground, or in the air. It essentially means that the ball is played "through", to the other player, i.e they run on to it. It is played "through" the defense, and is hard to cut out. Whoever has the most pace will win the ball.