I'll start by writing a sentence or two, and then the person after me gets to add a sentence to mold a story 😀
Once upon a time there was a mouse named Reepicheep...
This mouse knew a Narnian giraffe named Islie.
His nickname was Reep. 😀
Reep and Islie set off on an adventure.
They said before they left they would sail to the lone islands and then on from there.
They wanted to go on to the Utter East, specifically because...
There was lots of cheese and plants for Islie and Reep to eat.
Islie and Reepicheep boarded their ship, The Lion's Call, and set sail with a full wind.
They arrived at the lone islands first.
When they sailed as close as they could without being grounded, Islie decided it would be a good idea to scout out the city before she and Reep ventured in.
Then all of a sudden, Islie remembered she hadn't finished her laundry, so she and Reep turned the ship around and headed back to Narnia.
They finally reached Narnia and Islie was about to do the laundry when they were greeted by some unexpected visitors.
It was four hobbits named Tooky, Tenny, Luna, and Gypsy.
The hobbit named Tenny greeted Islie like an old friend and then returned to writing the list Tooky had asked her to write.
"Why, hello!" said the giraffe. "Come on in to the castle! I needn't tell you to watch /your/ head as you enter, but I'll watch mine." She escorted the visitors into the castle.
So Gypsy went into the castle and Tooky went after her other hobbit friend to supervise her writing of the list.