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 Waist Linking Puzzle. In Grandma’s Waist are four moons. Find the order to pull them so that they light up the 1, 2, 3, and 4 slashes. That’s the order you need to use for Sarah’s Sun puzzle in her waist.
Video for this puzzle can be seen her: Sarah & Grandma Waist Linking Puzzle on Youtube
In the sun puzzle, the height of the water is irrelevant. Use the same order with the suns that was used with the moons.
Once you do that, you’ll see that Sarah and Grandma are now linked at the waist.