We were trying to rack our brains to come up with a fun project for the boys one rainy day, when one of them said that they wanted to blow bubbles. Knowing it was not ideal bubble-blowing weather, we came up with the idea of adding color to the bubble solution! We had seen this project before using tempra paint powder, but we didn't have any. So we improvised and used food coloring instead!
We divided the bubble solution into several small dishes, then added a good amount of food coloring until the solution was dark. Then we gave the kids bubble wands and paper and let them blow the colorful bubbles onto the paper! When the bubbles popped they left colorful circles.
Having done it once, we now think this would make a great outdoor project (maybe with over-sized paper!). The bubbles tended to spray solution when they popped, spraying color as well. Make sure you are doing this in an area that can stand some mess and have your kids wear smocks - this can stain!
We also think this would make great wrapping paper!