How did Cronus kill his father?

KEROPPI: Uranus was the god of the sky and he was married to the Earth goddess Gaea (who was also his mother). They had three different groups of children: The Titans who were handsome humanoids and Uranus' pride and joy, The elder Cyclopes, and the Hundred handed ones, who had one-hundred hands and fifty heads. While Uranus loved the Titans because oof their beauty, nhe was repulsed by the Cyclops and hundred-handed ones and locked them away in Tartarus so he wouldn't have to look at them. So Gaea, who was sad to see her children locked away, plottes with Cronos to kill Uranus because he promised to free his ugly brothers and sisters. She gave him a scythe to use to kill his father.