Here is a revised script based on your feedback:
It is a beautiful summer morning. The sun rises over a small farm near a wide river. Behind the farmhouse, a mother duck sits on a nest of ten eggs. "Peep, peep!" One by one, the eggs crack open.
All the eggs hatch except the largest one. Mother duck patiently waits as this egg wobbles. Finally, it splits open with a "Peep, peep!" Out tumbles the last duckling. But this one is much bigger than the others - it is grey and ugly.
The next day, Mother Duck leads her fluffy yellow ducklings to the river. She jumps in and they follow,