​Found this green plastic thingy stuck in the couch. The end has 3 dents and the top looks like a plastic flower bud?? It’s light weight.

The end looks like a yarn can be wrapped around it to keep it in place?? But it was literally stuck in the couch under the couch (if that makes sense? -I’m not a native English speaker). It’s cca 15cm long. We just moved to this apartment and were cleaning under the couch and my bf pulled this out of it. Previous owners had a cat, so is this a part of something that their cat had?? Or is it a decoration?? Pls help