{{short description|Children's toy}} thumb|upright|{{US patent|2153957}} An '''eye popper''', '''rubber popper''', '''hopper popper''' or '''jumping popper'''<ref name="Oxford">{{cite web |url=https://www.ox.ac.uk/news/science-blog/how-do-jumping-popper-toys-work |title=How do jumping popper toys work? |work=Oxford News blog |date=15 May 2019 |publisher=University of Oxford}}</ref> is a children's toy. It consists of a small, dome-shaped piece of rubber or similar material resembling a half of a rubber ball; the shape of a smile is often imprinted on the dome. When pressed, the object inverts and becomes unstable and, after a few seconds, undergoes snap-through buckling to pop back into its original shape, making a loud popping sound.<ref name="Oxford"/><ref name="phun"/><ref name="teaching"/> If resting on the ground when this happens, the toy will fly several feet into the air. It can also be thrown on the ground, causing it to pop upward.<ref name="teaching"/> The eye popper's behavior resembles the process by which a ball compresses upon hitting a hard surface.<ref name="Hopper Popper"/>
==See also== *Pop it
==References== <references> <ref name="phun">{{cite web|title=Phun Physics - Demonstrations|publisher=University of Virginia|url=http://phun.physics.virginia.edu/demos/hopper.html|archive-url=https://web.archive.org/web/20181016131309/http://phun.physics.virginia.edu/demos/hopper.html|archive-date=2018-10-16}}</ref> <ref name="Hopper Popper">{{citation|last=Katz|first=David|title=Hopper Popper|year=2005|pages=1|url=http://www.chymist.com/Hopper%20popper.pdf|archive-url=https://web.archive.org/web/20050531135745/http://www.chymist.com/Hopper%20popper.pdf |archive-date=2005-05-31}}</ref> <ref name="teaching">{{cite book|isbn=9780070647473|title=Exploring Energy with TOYS: Complete Lessons for Grades 4-8|last1=Taylor|first1=Beverley A. P.|author1-link=Beverley Taylor|year=1998|publisher=Terrific Science Press}}</ref> </references>
Category:Novelty items Category:Rubber toys
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