The present invention pertains to an aerosol generating device comprising a housing (1, 2) having at least one air inlet (8) and at least one air outlet (11) and defining a principal air flow channel (P1) there between, an aerosol generator (5) positioned within the housing for providing an aerosol to the outlet, an activation device (4) positioned in the principal air flow channel and arranged to selectively activate the aerosol generator and airflow modifying means (9) arranged to enable a user to modify the airflow in the principal airflow channel in use, said modified airflow being detected by the activation device and thereby activating the aerosol generator. In particular the present invention pertains to electronic cigarettes or vaporizers which comprises means to avoid children or young person to use said aerosol generating device.
