2-3/8" dia. metal-backed button w/plastic flicker/flasher insert. ©1965 Mattel, Inc. Used as a retailer's promotional item, likely for in-store use to promote classic 1960s Mattel toyline that allowed users to make and bake their own rubbery insects/spiders/creatures. Text on back reads "Dimensional Research - Burlingame, California - Pat. Pending." Button insert features large "Creepy Crawlers" name and images of lizard, spider and insect that seem to move as button is moved from side-to-side. Metal rim shows some scattered wear but button is VF/Exc. overall. First we've offered.