King Uther and Igarine had a son named Arthur and during the time Arthur was growing up in dangerous time so Uther gave his son to Merlin the wizard.
Your father says I have to take care of you Arthur.
Then one day Arthur went looking for a sword for his brother, he came across the sword in the stone, so Arthur pulled the sword out and because he claims that he pulled the sword out he became the High-King of Britain.
He did it!
Eventually rebel leaders were getting tired of Arthur ruling over them so they decided they were going to go to war against him, so before the battle Merlin showed Arthur his friend the"Lady of the Lake" and she gave Arthur Excalibur, a magic sword that would make Arthur win every single battle he will ever fight in.
Here Arthur take this, with Excalibur you will always win your battles.
As the Lady of the lake said Arthur won the battles and many others as well.
We did it !
Once everyone agreed that Arthur should be King, every knight in Britian wanted to serve Arthur and only the best knights were called "knights of the round table."
You are now knights of the round table.
King Arthur and his knights of the round table went on many adventures most of them were either fighting their enemies or slaying beast. One of their adventures included 'The Quest for the Holy Grail."