Here's what I came up with:
I used VersaMark to stamp the darker dots and craft white to stamp the white dots. I couldn't resist adding some sparkle (I'm starting to think this may be an inadvertent trademark of mine!).
I recently participated in the Walk to End Alzheimer's in memory of my grandmother. I had several people who donated money and this card would be a perfect way to thank them for their support.
You can find the supplies that I used below.