If you like to collect old/vintage CRAYOLA products, you may wish to look at flea markets, auctions, estate sales and garage sales. More information about older products can be found in a published book titled "A Century of Crayola Collectibles - A Price Guide". This book covers history and products offered through the years. To obtain this book, please visit your local book store. As a further reference, the ISBN is 0-87588-638-8 and the author of the book is Bonnie Rushlow.