Goggles and a shower cap Your swimming trunk
When I am swimming.
It is not the most important thing in life but it is a good idea because in an accident it might involve swimming to survive.
just what they need, school books,pens(or pencils),a small snack and any thing else he might need a.k.a swimming trunks if going to a pool.
One might use flippers or goggles when swimming.
It's not really mathematical, generally you might need to think like "Breathe once, after 2 Strokes" Which you keep counting that goes under the concept Math. But nonetheless I don't think Swimming is much mathematical.
you can wear two but you might get a head ache.
It depends. You need to decide which swimming place.
goggles
Well, especially young kids need to be watched, because if the pool has a deep end, they could swim towards it if they are not great swimmers. They might also not be able to swim and they could drown, so always watch kids when they're swimming!
You might try donating them on "FreeCycle" Perhaps someone else can use them, thus no need to dispose of. Otherwise they need to go into the hazardous waste.
no