First, I trimmed the corners from the triangular beads, just to try a different shape. These look a bit more crystal-like, I think.
Then, I took a look at my bag of pom-poms. (I feel every home should have a ziplock bag of pom-poms, in case of emergencies.) I happen to have several different shades of blue, so I figured I'd paint the cardboard beads in a range of blues, too.
Because this necklace is made solely of super-light-weight materials, I wanted to weigh it down somehow. I glued two dimes to the backs of the two center beads. I recommend doing this before you string everything together, which as you can see, is not how I did it. (This photo also illustrates why you should always paint first, decoupage second.)
I cut small pieces of regular white copy paper to match the shapes of the two be-coined beads. I coated each paper bit with glue, then smoothed it over the coin and the back of the bead. This will help the dime stay right where it is.
But wait, there's more! I had a few of the other decoupaged beads left, so I made a third necklace with the alternating-pom-poms scheme, below.