The phrase "ball of yarn" refers to a tightly wound mass of yarn that is used for knitting or crocheting. It can also be used metaphorically to refer to a complex situation or problem that is difficult to unravel.
Sentences with «ball of yarn»
I just added a basket / bowl full of balls of yarn to a table in the living room. (theinspiredroom.net)
There's also a golden ball of yarn that's hidden throughout each level. (iamericm.com)
And don't forget the simple (and cheap) things like paper bags and balls of yarn for cats. (fourleggedguru.com)