I did these all for the the "Keeping it Simple" blog post this week at http://pebblesinc.blogspot.com/ I used a premade box that I just had to assemble from Creative Imaginations, and cover it with paper. The card was also super easy. I just strips of Pebbles, Inc. Ribbon and strips of pom pom fringe to make my tree. I then added the chip star (also from Pebbles) on top.
For the Christmas tree above, I purchase a premade form from Hobby Lobby. I tore strip of pattern paper and dipped the edges in gesso (you could us thick white paint as well). I just continued to glue the strips on from the bottom up, so it looked like a tree covered in snow. Next I added Pebble's Chips to act as ornaments for tree. It took under 30 minutes to comple and was really simple to do!