You should be able to request a security pass from the airport ticket counter to escort your children through security to the gate. Typically, a parent or designated accompanying adult must take the unaccompanied minors to the departure gate and remain until the flight is airborne.
First get to the airline boarding pass counter(of which you've booked ticket) and then ask airport staff for the directions of security check... Reach to the boarding gate 30 minutes before the departure of your flight. Do not carry any liquid items with you inside the airplane. For further help you can ask airport staff they'll definitely help you.
Every Airline have a Policy and Procedure for UM (unaccompanied minor)
When you get to the airport go to the airline your children will be flying on. Go to the desk to get their boarding passes printed. While you are there tell the agent that they are unaccompanied minors and that you would like a security pass so that you can stay with them until they board the plane. They will put a note in their system that they are unaccompanied and watch out for them. I believe they need to know who will pick them up on the other end. That person will need to have their I'd. They will need to do the same thing so they can be at the gate to greet them as they come off the plane.. Of course this means you need to also go through security with the children as well.
Looks like you should be good now with all the feedbacks received from above local guides.
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