Originally Posted by
frankmu
^
It is worthwhile domestically when they can get three beeps for PreCheck (I know you can take one child under 13 through PreCheck with you, but it's nice if they can do it on their own)
I'm not aware of any limitation on the number of children under 13 you can take with you. On the Precheck FAQ site, it says:
Q. Are travel companions eligible for TSA Pre✓™ as well?
A. Passengers that do not meet the necessary requirements are not eligible to participate at this time; however, passengers 12 and younger are eligible for TSA Pre✓™ expedited screening benefits as part of our modified screening procedures for this age group.