A Spool and Coin Tower

I sat down beside the umbrella stand and pulled that green wooden spool onto its flat base. *Hehe!* What if it had a shiny silver roof? I took my heavy silver coin, carefully hoisted it up with both paws, and set it right on top of the wooden rim. It wobbled just a tiny bit, so I nudged the coin center until it found its balance! Perfectly flat! Next, I reached into my burlap pouch, picked out a tiny pointed purple gem, and gently perched it right in the middle of the silver coin. Look at that—a tiny glowing castle right on the wooden floor!