So, we pull up behind this minivan at a stop light, and Becca and I immediately start laughing, uncontrollably, but as quietly as we can.
Eva starts asking, "What is that? Mom, is that a drawing on that car? Mom, what do you think that is?"
We followed them to the next stop light to get a picture. They pulled off at the next gas station, presumably to wash their rear window.
Postscript: looking at the picture just now, Eva's reaction was:
"Oh my god. (pause) That's a funny license plate."