The Tulip Amicolle i-cord KNITTER Machine is a user-friendly and stylish quality knitting tool. You can make many items, including knitted letters, straps, cords, accessories and interior decorating items, in an easy, fun, and FAST way. This pack contains one machine, one 2.2 mm weight and crochet hook.
 
Note: Best used with Sock through DK weight yarn
 
One of our favorite yarns to use with the Tulip I Cord Knitter Machine is Tonic DK.  (pictured in second photo above)  Tonic DK Yarn comes in so many colors, and the acrylic/wool blend is soft, yet durable! 
https://www.beadplace.net/search-results?q=tonic
 
Other fun use:
   To make letters/words or other fun shapes, insert 12 ga. Aluminum wire into your I cord, then gently bend into desired shape!   
https://www.beadplace.net/search-results?q=12+ga.+Aluminum+wire