A shiny circle on the rug

I waddled off the sunny sill and tumbled softly down onto the woven floor rug to inspect a tiny spark of light. It was an iridescent coat button lying quietly between two yarn tufts, reflecting little rainbow glimmers! I tilted my smooth conical base against its rim, rolling it half an inch into a cozy sun patch so it could shine its brightest. I leaned close and told it that it held the most splendid shimmer in the entire world, and it looked so pleased resting right there.