A safe and easy way to add a new ball of yarn in knitting March 11, 2019 / A safe and easy way to add a new ball of yarn in knitting. Almost invisible, this method allows to add a new color, or a new skein, when you ran out of it. So Woolly. Gimme your email...And I'll give you free patterns, tricks, tips, exclusive offers & automatic entry to great competitions! I agree to have my personal information transfered to MailChimp ( more information ) I will never give away, trade or sell your email address. You can unsubscribe at any time.