I took the snow globe portion of the Everyday Winter Cards from SVG Cuts pattern. Then the search began for the marbles (or ball bearings) of a size that would work. Tried looking at bb's, but they were too big. Then I asked my husband, and we realized that he sells ball bearings and the size was perfect! Score!
I had to build up the outer edges of the circle portions in order for the marbles to clear the acrylic. It took 10-11 thicknesses of cardstock for this to happen.
I made each background with a map where they had traveled. Then incorporated their goofy faces on the map and printed them out and glued them to some cardstock. I made hole punches on their noses, and then on some of the cities that they had visited (one got Italy and one got Austria). Each had five ball bearings.
Here's the front of the finished card.