When it involves sturdiness, I don't have any issues concerning this falling apart or remaining unsafe for my cats. The spiral springs bend when you utilize power to them, but this isn't an everyday concern (or anything my cats would even do). However, This may become a good detail as https://how-to-make-dog-toys-to-s43195.iyublog.com/29178222/the-greatest-guide-to-cat-toys-yarn