This is a fairy tale from brothers Grimm's Book , I'll add some adjustments in the next chapters....
Chapter One ( original):
A peasant had a son who was only as big as a thumb and did not grow any larger. In several years he did not grow even the width of a hair. One day the peasant wanted to go to the field and plow, and the little one said, "Father, I want to go out with you."
"You want to go out with me?" said the father. "No, you have to stay here. There's nothing that you could do to help me, and besides that you might get lost." Then the thumbling began to cry and was not going to give the father any peace until he took him along. So the father put him in his pocket and carried him to the field, where he placed him in a fresh furrow.
While he was sitting there a large giant came over the mountain towards them. "Do you see that bogeyman?" said the father, in order to frighten the little one into being good. "He's coming to get you."
Now with his long legs the giant reached the furrow in only a few steps. With two fingers he carefully picked up the little thumbling, looked at him, then walked away with him without saying a word. The father stood there so frightened that he could not utter a sound. He believed that his child was lost, and that he would never see him again as long as he lived.
The giant took the child home and let him suckle at his breast, and the thumbling grew large and strong like a giant. After two years had passed, the old giant took him into the woods in order to test him.
He said, "Pull out a switch from over there." The boy was so strong already that he pulled a young tree up by the roots. The giant thought that he could do better and took him back home and suckled him for two more years. When he took him into the woods to test him this time, he was so much stronger that he was able to pull up an old tree.
This was still not good enough for the giant, and he suckled him for yet another two years, took him into the woods, and said, "Now pull out a decent switch for once." This time the boy pulled the thickest oak tree out of the ground. When it cracked the boy laughed.
When the old giant saw this, he said, "That's good enough. You've passed the test." And he took him back to the field where he found him.
The father was plowing again, and the young giant walked up to him and said, "Father, see what a man your son has become."