Ah, children's games. Who could forget the fun, the laughter, and the bodily damage that we all got from them?
Most Likely, Lawn darts were created by ancient Spartans who wanted thier children to experience war at a young age. This invention ended up hurting more children than the amount of Persians killed in all of the movie 300, with a shocking 6,700 injuries and 3 deaths. Thankfully, the U.S. and Canadian government both illegalized them in 1988 and 1989. Even so, all you parents who are willing to spend exorbitant amounts of money on something that will get you calls from the Child Protection Agency can find complete sets on the internet for around 300$.
During medieval times, many games were created including tug of war and greased pole climbing. The main reason these kinds of games became popular at this time was that they cost nothing and needed only the simplest equipment to play, which almost no-one had the money for. Sadly, one of the only things that children of the Middle Ages did have was the natural urge to hurt themselves. One such way they did this, was through a game called duck on a rock. The point of this game if you were the defender was to keep a large rock placed on a stump or stool from being knocked over while all of your "friends" hurl rocks at you.