Task: Story Composition
Input (English): Premise: Pete had been looking forward to building a treehouse for years. 
 Initial Context: When his son Seth turned 8, he decided they could build one together. 
 Original Ending: Pete gathered all the wood and materials, and was excited to start. But 10 minutes into building, Seth wandered off to play video games. He realized his son didn't care about the project as much as he did. 
 New ending: Pete gathered Seth, and was excited to share it with him. But 10 minutes into playing with it, Seth wandered off to play video games. He realized his son didn't care about the gift as much as he did. 
Output (English): When his son Seth turned 8, he decided to buy one instead.