Key Points: How to Write a Children's Picture Book

(From the Howcast website)

1. Research structural concepts e.g linear, abstract, closed and open narratives
2. Write 25-28 pages on a universal theme to suit the age group (0-5 years). This theme can be built upon and have added complexity later on. 
3. Make the words vivid - describe what the pictures show. 
4. Develop the characters, setting, plot, conflict and reaction - make the story incite curiosity. 
5. Make sure to include alliteration, rhyme, wordplay and repetition. 
6. Look at illustrators and decide which style is best fitting to the story you're telling and the age you're targeting
7. Read the story aloud, making sure the rhythm and pace is suitable for your story.

The video gave clear instructions in even more detail than this, ensuring that there is no issue with the creation of a children's book.