10 Toys So Popular They Incited Violence

Players contribute an equal number of pogs to build a stack with the pieces face-down, taking turns throwing their slammers onto the stack top, causing it to spring and the pogs to scatter. Players keep any pogs landing face-up after they're thrown. Yvonne Hemsey/Getty Images

Parents aren't the only ones who go a little bonkers over playthings. Schoolyard scuffles over Pogs became so rampant in 1995 that many officials adopted a "Zero Pogs" policy on school grounds.

In case you missed the boat, Pogs was a disc game that could be played in a variety of ways. Typically, the winner took possession of the coveted discs. This modern spin on the traditional marbles game first burst on the scene in Hawaii and quickly made its way mainland, where so many fights erupted over Pog trades, thefts and losses that the trend fell out of favor with teachers and administrators [source: New York Times]. Eventually, the hubbub died down among the children too, to the relief of educators and unskilled Pog-players everywhere.