We really wish we'd found this project idea yesterday because it would've been a fun thing to do on such a rainy day. All you need is milk and food coloring like you see above. But when you add a little dish soap, here's what you get:
Pretty isn't it? If you can make sure your toddler doesn't stir it around, but just touches the dish soap on a cotton swab to the colors, you'll get these lovely designs.
The monthly theme over at Unplug Your Kids is soap, and they have a lot of great ideas, but this one looks like it would keep our little one occupied for a while.
(Images: Unplug Your Kids)