During the Night at the Barn chapter, you’ll need to link Sarah and Grandma together through their eyes, arm sleeves, and waist. This is the Arm Sleeve Linking Puzzle. The goal is to take the symbols you see in the tear in Sarah’s Arm and align the same symbols in Grandma’s arm.
Video for this puzzle can be seen here: Sarah & Grandma Sleeve Linking Puzzle on Youtube
Take these symbols and their order from Sarah’s sleeve and reorder Grandma’s to match.
Then you will see that Sarah and Grandma are now joined at the sleeves.