Here's what happened next:
I liked it at this point, but it needed more:
I thought I'd messed it up after adding pan pastels and water-soluble oil pastels, because it got too dark. I started to erase the pan pastels, and decided to make these bubbles instead. But it still needed something...
Now the bubbles really "pop" - no pun intended! Also, I have a rule that once I date-stamp the page, it's done, no matter what. Other wise, I might just keep going in there and making changes forever!