It's those plastic round looms, like this: https://www.amazon.ca/Knitting-Looms-Round-Loom-Set/dp/B0CD5JD1PP/ref=asc_df_B0CD5JD1PP?tag=bingshopdesk-20&linkCode=df0&hvadid=80195748933577&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4583795285230800&psc=1

A friend's mom gifted them to me years ago, just relearning how to use them.