Interesting

The first refrigeratormagnet was obtained by William Zimmermman of St. Louis, Missouri, in the early 1970s. Zimmerman patented the idea of small, colored, cartoon magnets to be used for decorative  display and convenience.

A largest collection of refrigerator magnets belongs to Louise J. Greenfarb also known as The Magnet Lady, from Henderson, Nevada (supurb of Las Vegas, USA). Her world record was included to the Guinness World Records wirh 19.300 items as of 1997. According to the British "Book of alternative records", it grew to 29.000 as of February 2002, and later up to over 30.000 items. Over 7.000 magnets from Greenfarb's collection are exhibited at the Guinness Museum in Las Vegas.