In sewing, notions are small objects or accessories, including items that are sewn or otherwise attached to a finished article, such as buttons, snaps, and collar stays. Notions also include the small tools used in sewing, such as needles, thread, pins, marking pens, elastic, and seam rippers.
Why are sewing supplies called "Notions"? This association of “notion” with one's personal ideas or whims led to “notion” being used to mean “bright idea” or “clever invention,” which in turn led to the word “notions” being used in late 18th century America to mean “cheap, useful articles” sold in shops.