Thanks for taking Mini-Skein Magic! There are many options on the market for beautifully curated small skeins.
This page contains affiliate links which may provide a small income to me but don’t cost you anything extra.
BEFORE CLASS, see your class supplies list for all the materials needed in class. One of the supplies needed is at least 200 yds total of a fingering- or sport-weight yarn, in at least 5 different coordinating solid colors. All of the yarn should be the same yarn, dyed in different colors. Wind the yarn into center-pull balls before class.
Some suggested yarns are listed below. Note that these are not the only yarns that will work. If you have your own favorites, feel free to bring them to class.