The wishing well is a reward item that you can only get by scoring extremely high with the Garden Club when you try for a membership with them.
Did you download the swingset and then place it inside of your downloads folder? If so, then I'm afraid I can't help on that.
As for the fish, your pond has to be at least 4 squares wide and 2 squares deep. Also, you can't fish when the pond has frozen over.
EDIT: I can help with the swingset. Check out
http://www.snootysims.com it is a known issue with the bonus items. Theres a link on the frontpage there for a message from MaxoidDrea about it.
Thank you flyleaf and Enchantedw0lf, :thumblef: on the info regarding the wishing well. About the swing set what I read at snootysims was:
Bonus download faulty
Many people are having problems with the bonus items like the trellis and raincoat. Some items are not installing and those that do, don't show up in the game. MaxoidDrea posted a message in the Sims2.com BBS that Maxis is aware of the problems and are working on a fix.
So that answers those questions.
My pond, I am not sure about the depth, but it is much bigger then 4 squares. I will go and dig it deeper to make sure.
Thank you so much not only your help but your quickness in doing so. I was wondering if buying the primo guide might help me a bit??
TickleYu