It's not a ruler, but at the top of her bookcase is a book called Tess's tree. Push the book off of the bookcase and it makes the ramp. Hope this helped!
shove them off
mark
by putting the battery on the truck and dropping the book on top of CJ Desk then it will hit the ruler causing it to turn into a ramp Good Luck :D
Jump off the ramp of books when you find CJ out the window
You push the Tess's tree book (on the bookshelf) until it falls.
you not down the books on the top of the book shelf and use them as a ramp
If you want to pass the ramp, you need to drive the car and it will fly you out of the window. But you need to pass overs to get to that point. if you want to figure out how far away you are from that part, try using youtube.com and type in Shrink ray island.
because you have to talk to the man first
Once cj says who the thief is push tess's tree off the shelf and get truck and dive on ramp.
you knock down the book on the top self by the computer and use it as a ramp to jump on.
you use the remote car to get out of the house but first you have to drop a book from the shelf to make a ramp
I don't think you jump into bubbles in Shrink Ray Island!