Here are some more of my latest felt squares. The brown one reminds me of an animal print, although I didn't design them with that in mind. They are destined to be made into hearts too, so once they are, I'll post a photo of them.
The white one reminds me a bit of marble with all the veining. I'm not sure whether this one was quite as successful as the brown one, but again, it will be different. It's good fun to experiment!