In kids stores, almost all color of bear dolls are brown. In fact, not all bears are actually brown. If you want to teach your kids about the colors of bear, you may try to use Bear Coloring Pages.
By the Bear Coloring Pages, you will able to tell your kids that there is actually a bear which is white, named polar bear. There is also one which is black, named honey bear.
It will of course be easy for you to get the Bear Coloring Pages. If you are unable to find it in any bookstore, you may try to find it in internet searching engine. There are of course some that is printable so that you can print it at home for your kids.