The yarn is Naturally Dyed Wool Yarn Worsted Weight in colors:
Bright Red, Orange, Sun Yellow, Avacado Green, Indigo Blue, and Magenta.
The yarn is dyed with eco-friendly, all-natural vegetable dyes. The Bright Red and Indigo Blue do turn your colors each color respectively. I giggled quite a bit when the kids thought I was bleeding after knitting one of the red parts. This indigo Blue was a deeper color than the one I made the last sweater in and I just love how each individual batch is it's own unique color. Also, if you have one solid one planned, make sure you order it all together because each batch may be slightly different colors.
I used circular needles size 6/26 and 9/26 which I got from Organic Cotton Plus years ago and now I can say that they have some years of use out of them and are amazing.