you not down the books on the top of the book shelf and use them as a ramp
In Shrink Ray Island Poptropica, with the truck you use to jump out the window of the girl's room and go and save her. ( But, that is not until almost the end of the game.)
Put the battery into the truck. Push the book Tess's Tree down from the shelf. Drive the car out the window.
Jump off the ramp of books when you find CJ out the window
1st one 87 and the other 16 to see the science fair out of the window.
I don't think you jump into bubbles in Shrink Ray Island!
The game will not let you run the truck up the ramp until you complete the other tasks. Before You jump out the window you have to talk to CJ through the window with morse code (twice), once after flushing the Thumb Drive. When you get her second message (telling you who the thief is), you realize that she is in danger from the thief, so you have to drive to the school to protect her.
So you can jump off it (in the car) and then you will go out the window (at the end). Hope I helped! :)
you jump
jump out
follow thinknoodle's answer!
Once cj says who the thief is push tess's tree off the shelf and get truck and dive on ramp.
shove them off