I'll have to be careful as I don't want to ruin the solution for any other players, but here's a hint:
For the pencil levels (there are two), take note of the markings in the background, these indicate valid placement locations. You can pick up and move the pencils around; the goal is to place them in the correct location (there is a pattern). You'll notice that objects snap to a valid placement location, and if you've placed correctly, the objects will align and not be interactive anymore.
Give it another try and let me know how you make out. If you're still stuck, there's a video in a previous comment that shows the solution.