Antimatter for kids..
Interesting link here https://livefromcern.web.cern.ch/livefromcern/antimatter/kids/AM-kids00.html
"Until a very smart guy named Paul Dirac thought about it: he found a very simple way to describe the proprieties and behavior of electrons, but... there was something curios about it! His description would only work if the electron had a "twin" particle, identical to it but with an opposite electric charge. It would be just like its mirror image! "
PS: I wonder if they meant to title the page "The Mistery of Antimatter" . I shouldn't even try to poke fun here, these folks have huge brains and write shows for Nova, which I can barely follow.
spat