The boys have been into experiments lately. I found a bunch that we are trying out on familyfun.com. We tried this one today. I thought the instructions said to use Kosher Salt so we did and it doesn't work so well! We also found that using a wider jar works better.
We'll probably do this again once I get some more oil and salt from our new house. I keep realizing I've moved things we need! The boys enjoyed it a lot. We talked about why the oil floats on top. The boys loved seeing the bubbles.
Sorry we didn't get a picture. It was a little messy and the camera was upstairs.