Final answer:
The 3 groups of offspring from Gaia & Uranus in Greek mythology include the Titans, a group of twelve, followed by the Cyclopes, a trio of skilled one-eyed giants, and the Hecatoncheires, fearsome giants with a hundred hands and fifty heads.
Step-by-step explanation:
The 3 groups of offspring from Gaia & Uranus in Greek mythology include the Titans, the Cyclopes, and the Hecatoncheires or Hundred-Handed Giants. The Titans were the first group, consisting of twelve offspring, six males, and six females, who are perhaps the most well-known children of Gaia and Uranus. They were primordial deities that held significant power in the cosmos.
The Cyclopes were the second group, a trio of one-eyed giants who were skilled blacksmiths, and they created Zeus's thunderbolt, Hodes's helmet of invisibility, and Poseidon's trident. Finally, the Hecatoncheires were incredibly powerful beings with a hundred hands and fifty heads each. Despite their fearsome appearance and great strength, they played a less prominent role in the myths.