Stringing Yarn

I am not sure which kitty it is, but lately, I have had yarn strung throughout the house.  I have piles of yarn that is in bags, but not sealed.  Some kitty has discovered these piles of yarn, and from time to time, will pull out the yarn and string it through the house. Today, there was a string of yarn through a cat play tunnel and around the house into the living room.  I cleaned that up.  I do not have the energy to put those skeins of yarn away right now, but that is a project that is begging to be completed.