I recently made 10 of these cards for a swap. The theme of the swap was Moving Cards. If you shake the card the sand moves. Here's how I did it:
I cut card templates and the frame and "window" (which is a peice of acetate - overhead projector film) using my Art Philosophy Cricut cartridge.
Next I stamped images I wanted to see behind the window on to my card base. I used Just Chillin C1495. Inks are Pacifica, Lagoon and Smoothie.
Attach the plastic window to the frame using Liquid Glass Z679. I love this product and it dries really fast.
You'll only need a thin line of Liquid Glass. The plastic film I used had a rough side and a smooth side. I put the rough side facing the inside of the card.
Attach double-sided 3D foam tape Z1151 to all sides of the frame on the side with the window glued onto it. You need to make sure all gaps are closed with the tape so your shaker material does not escape.
Pour a small amount of sand, beads, or whatever your shaker material is onto the base of your card. Dust the debris off the card so you can attach your frame to a clean surface.
Remove the paper from the foam tape to reveal the sticky strip and place the frame over the sand and stamped image. Press down all sides to make sure you have good contact. You don't want sand escaping.
Embellish as desired. I added some hemp. Isn't it cute?
Have a memorable day,