Weekend Farmers Markets

My Mum takes crafty stuff to markets. If she were to make some cards or coasters incorporating old images from calendars, magazines etc, and sell them, is she violating copyright law? Could she potentially be sued by the publisher of the magazine or calendar, or the photographer?

(I’m rather paranoid about copyright, because I work in the music industry… I’d rather be safe than sued!)

I am going to the markets to sell some old stuff, with my auntie.
But i want to make some things to sell
I am making a collection of friendship bracelets and bookmarks
~what are some other things to make
* What price should I sell them at
-what should I put on the bookmarks/what would you like on the bookmarks
AND what colour friendship bracelets