If you (or your seven-year-old) have hidden applications on your Blackberry, it is simple to view them again. This Tech-Recipes tutorial explains how this is done.
You can use these instructions to view applications that have been inadvertantly hidden on your Blackberry.
From the home screen, press the alt key (crescent moon) and press the scroll wheel. In the menu that pops up, select Show All and click the scroll wheel. Applications that are hidden are now visible and have an X through them.
To make hidden applications invisible again, repeat the process above.