The first photo is a close up of the stickers described below.
I am including a photo of me wearing one of my rainbow flower t shirts from Zazzle holding my mountian bike with stickers on a spoke. On Zazzle, I have a line of products using this bicycle parts rainbow mandala tha I call Good Day Bikes. "Bike your way to a good day." is my slogan. I ordered a sheet of 6 of these stickers from Zazzle without knowing exactly what I was going to do with them.
They are a little big to fit on the frame, so I finally came up with the idea of putting two back to back on a wheel spoke. I think this could be a popular thing, especially with kids. People could do the same thing with all sorts of stickers, but this is particularly appropriate as it is a design made with a rainbow of bicycle parts.