Meet Summer Nights Bonus Bundle Bonus Bundle! Summer Nights Bonus Bundle, a multi-colored CYC 1 yarn that is twisted with a thin strand of metallic thread, is perfect for knitting or crocheting shawls, scarves, or any top that needs a bit of bling. Have some solid worsted weight yarn in your stash? Run a strand of Summer Nights Bonus Bundle with it and you will have created a unique yarn with a hint of color and sparkle