One possibility may be to, on completion of the parent survey, make an AJAX call to a remote PHP script that uses the
Remote Control 2 API
to create a token and send an invitation mail for the teen survey.
Here is an example of such a PHP script (it could probably be cleaned up a bit) - www.limesurvey.org/forum/can-i-do-this-w...s-to-a-survey#149782
Here is an example of such a PHP script (it could probably be cleaned up a bit) - www.limesurvey.org/forum/can-i-do-this-w...s-to-a-survey#149782