This is one of those challenges that I did for fun, not for really learning anything. It can be very relaxing just going out and playing around :)
In this case, I found a chair made out of colorful bottle caps. Set my camera to a slow shutter, and started taking photos while moving the camera around in different patterns. This pattern worked the best. The circles all seem to contain their bottle cap, while at the same time meshing everything together.
To help the color, I used the Vivid image style on my camera, which pumps up the saturation even further than just pumping up the saturation myself in other styles. I wanted a bit more color still, but this works.
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Wow, thank you for the votes and comments! I didn't think I had a chance to make a honorable mention in such a challenge. Even more fun :)
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Fun fact, when my 2.5 yr old son saw this, he immediately said "doggy!" I mostly dismissed it, but then kept looking. All of a sudden, it popped out at me. On the left side of the image there is a likeness of a dog. Half its face is blue, half white, and a black nose.
If you still can't see it, I have a rough outline:
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