I got this general idea off (you guessed it) Pinterest. The 5x7 shadow boxes were on sale this week at Michael's for something like $4.50, so this was really cheap. The jingle bells, also from Michael's, came in a tube with assorted colors, and I used about 2/3 of them for each shadow box. The letters are glittery chipboard I had left over from another project. The snowflake "dot" of the "i" is piece of cs punched out with a pink adhesive gem in the center. I also added some B&T paper with a muted pattern of snowflakes for the background. The bells are loose inside the box, so they shake (and jingle!), and you can let them pile up any way you like.
Here's a second jingle box I made:
This time I left the black felt in the background that comes with the shadow box to show off the blue, silver, and white bells. I also gave it a horizontal orientation instead of vertical like the first box. "Jingle" is stamped with white ink on the outside of the glass. The glitter sticks to the background and the back of the glass and adds even more sparkle.
Here are both boxes together: