I am so glad I found this in Splitcoast, it is so quick to make & it's hard to tell you made it yourself!!
You start out by creating your cover, by stamping a 12x12 sheet in this example, with your favorite stamp set & colors, depending on the occasion. Think of all the colors you could do this in! Or, you can just use Plain or Designer series cardstock.
1. Now that you have your 12x12 paper made, you can get started with the box. For this particular size box, we're using the 12x12 size for the top cover & a 11.5'' x 11.5'' for the bottom. Draw a line with a ruler in pencil from corner to corner, forming an "X".
2. Using a bone folder, fold one corner to the center point of the "X".
3. Fold the edge of your previous fold so it meets the center pencil line.
4. Unfold your previous folds. You are left with a set of horizontal creases.
5. Repeat steps 2-4 for the remaining three corners. When completed you will have a series of creases that form a grid.
6. You will make four cuts with scissors. Pick two opposing corners. Create a tab that is 2 blocks wide and two blocks high (not including the "point") by make one snip on either side of your determined crease grid. Repeat the same snips on the opposing corner.
7. Fold the opposing corners that have not been altered to the center point of your "X".
8. Fold them in half again, creating the first two "sides" of your box.
9. Fold the ends of the sides inward, forming the base of the remaining two sides.
10. Fold the tabs created in step 6 over the side bases created in step 9. The point of the step 6 tabs will meat at the center of the "X"
11. Now you have completed your box lid! Lined and everything, without any extra effort!!!
12. For the bottom, just repeat all of the above steps, except your beginning cardstock should measure 8-3/8" square.
The fun thing about these boxes is that you can make them any size, it just depends on the beginning measurements of your cardstock square. (Always make your box bottom cardstock square about 1/8" or 1/2'' smaller than the one used in creating your lid, depending on the thickness of the cardstock.) For the itty bitty one shown here, they started out with a 3-3/4" square for the lid and 3-5/8" square for the bottom. There are lots of things you can DO with the boxes as well. You could make a set of nesting boxes. You can tie them with ribbon or add tags. The possibilities are only limited by your imagination!

Thanks for your message Sue!
And congratulations on becoming a SU Demonstrator, great choice! :-) If you haven't already, you've got to try making that box right away, you'll be amazed how easy & fun they are to make! Everybody loved it, but like I mentioned before, I just found it in Splitcoaststampers, what a great site for stampers!! Feel free to use whatever you can from here & of course, you can receive my Newsletters. By the way, if you have a Blog or any good websites you can share with me as well, I'd love that... for your privacy, you can send directly to my inbox. (the link is in here)
Nice chatting with you, keep in touch...
Joanne
Posted by: Joanne | February 06, 2008 at 10:00 PM
This is a great idea, I am just a new demonstrator and always looking for new ideas. I hope you don't mind me using this wonderful box for a future workshop. I'd love to get your newsletter it is so exciting to see all the things that can be done with Stampin Up.
Posted by: Sue Kaiser | February 06, 2008 at 05:45 PM
Thanks Diane!
But I can't take the credit, I found the tutorial on splitcoast & loved it so much I had to share!
I actually had a class tonight, the one they make an ornament & box for $5, and between the 3 girls who came, they made 22 of them all together, as they were so impressed of the variety of designs you could make, and for the boxes, we just used the Stampin'up Designer sheets for the tops & matching cardstock for the bottom, they made some really nice ornaments, it was fun!
If you don't want to miss anything, feel free to sign-up for my Newsletters on the home page.
Thanks again for your comments!
Posted by: Joanne | December 13, 2007 at 09:51 PM
What a beautiful box, I can't wait to make some. My sister Janice told me about them and how easy they are to make. I cannot think of an occassion not to make one. Also, you Christmas balls with the snowmans are just too cute for words. I now know my new Christmas presents for next year. Thank you
Posted by: Diane Doiron | December 13, 2007 at 07:27 PM