how much does it cost for a child of 5 to go swimming (a visitor) of people that have cards?

It's free depending on the membership.

It cost something after 3-5 days..not sure how much. All the Ys do things independently and I haven't had the experience with this one...hope this helps a little..

Free 3 visits with adult.

Person with a card will cost about 35 or 45 for a 5 week session but I'm not sure as a visitor