Make background process interact with fg process

Hi,
I have written a menu driven shell script in which as per the choice, I run the another script on background.
For eg:

  1. get info
    2)process info
    3)modify info

All the operations have different scripts which i schedule in background using &.
However I wish to display the error statements seen in executing any of the above script on foreground process or atleast be able to signal the fg process that background process has stopped.
How can I do the same?