What are some products in America not found in Canada?

Guns.

Why are you asking this on a Canadian site? How does any Canadian know what things are not available in Canada - if they are not available?

I don't do much cross-border shopping myself, but if you're thinking of food I know this topic gets talked about a lot on the Chowhound message boards. You could browse any of these threads for ideas: Trip to Buffalo N.Y. what grocery items would you bring back? http://chowhound.chow.com/topics/652527 Cross-border grocery shopping picks... http://chowhound.chow.com/topics/516780 American snack foods you can't get in Canada? http://chowhound.chow.com/topics/723689 What foods, available in the U.S. and not in Toronto, do you covet? http://chowhound.chow.com/topics/448226 American stuff (foodstuffs, equipment, etc.) you can't find in Canada? http://chowhound.chow.com/topics/675540 I also know that 100 Grand Bars are available but hard to come by in Canada, and I don't think Mallomars are available at all. Of course, how well food would do in the mail is also a consideration...

You would have received a lot better answer if you specified where you live in America and where they live in Canada. If they live in Newfoundland or the Yukon, they aren't going to be able to get much...but if they live in Ontario, then they're going to be able to get a lot of the things you can offer.

I don't think I can be much help, but I do have a friend who lives in the U.S. who mailed me some Tom's of Maine honeysuckle baby shampoo (that I used for myself) that I really loved and then was disappointed not to be able to find any in Canada (at least in my region). That, and some specific cosmetic brands can't be found in Canada, but since we are each other's main trading partner, we do have most of what the other has...