Dragon Story for my nephews

So I am starting to write a story for my nephews. I am still uncertain of how I am starting the beginning of the story. I have 2 versions of the beginning so far. The first one is were a boy named Derik and his brother Dylan find an egg in the woods. Dylan is the younger brother and he wants the egg because it's glowing and he takes it from his brother. But as soon as Dylan takes it it stops glowing. He gives it back to his brother saying "I don't want it anyway it's broken." Derik has it in his hand and the egg starts to crack. Dylan smirks and says "Told you it was broken." Losing interest in the egg Dylan wonders off to look for something like that egg. Derik isn't  paying attention and just watches as the egg cracks and a red scaly hand with a claw pops out of the egg. Next the head. Thats when Derik knows what it is. Dylan comes back with a frog. And I haven't written this yet because I am not sure I can have the frog because it is Christmas time so there is snow.

Other beginning that I have been  thinking about starts with Dylan coming home from school and sees his mom putting the groceries away. He sees her putting eggs in the fridge and yells at his mom because baby chickens could be in the eggs. So he steals one and sticks it under his pillow. It hatches into a dragon.

I was thinking on another beginning where Dylan takes a chicken egg from his mom and  Derik finds the dragon egg out in the forest by himself .When Dylan finds the dragon egg he thinks it is his egg. He doesn't know that his mom took the chicken egg out of his room when she found it cleaning his room. Derik and Dylan get into a fight over the egg. Then it cracks and Dylan yells "You broke it !" Dylan runs out of the room to tell his mom that Derik broke his egg. A red scaly hand with a claw pops out of the egg. Next the head. That's when Derik knows what it is. Derik hides the dragon in Dylan's closet when he hears his mom coming up the stairs. He scoops up the remains of the egg shell and hids it in Dylan's laundry basket. Mom and Dylan walk in and the mom tells Dylan there was no egg because she cleaned his room and took it out. Dylan starts to argue with his mom telling her there was a baby chicky in there. And the mom and Dylan leave the room while the mom explains that the eggs she buys at the store don't have baby chickens in them. They make sure they don't. Derik opens the closet door to find out that the dragon had some clothes on fire. It was a small fire and Derik was able to stamp the fire out with his sneakers. Derik names the dragon. Not sure what yet. Plan on having Derik raise the dragon. He finds out the dragon likes live food. Cause he sees the dragon eat Dylan's pet hamster. He tells his brother that the hamster ran away.  So as it grows the food he eats gets bigger and bigger. And he can't hide the dragon from his mom and brother anymore.

Not sure how to end the story though