Thank you, thank you, thank you!  I had this book as a kid and loved the polar bear story, and now that I have kids of my own, I've been driving myself insane for the last year and a half trying to find it.  I am so glad that (a) someone else was looking too, (b) you knew the title!, and (c) I happened to resume my search tonight for the book.  I had given up several months ago, but I see that these posts are recent.  Thank you!  :o)