What do you do after you read the diary on shrink ray island?

If you haven't yet in CJ's room there is a trash can and you will need to knock over the trash can to get more pieces for the diary.

If you have go into CJ's bathroom and you will see a hairdryer which you point it upwards and put it on. Then you go into the air the hairdryer is blowing out and lift up into the other side of the bathroom, make sure you look at the article which says about reading codes in the magazines next to the toilet.