First you get to sign their application as the pilot.
Do a good passenger briefing to include where the barf bag is and what to do if the plane goes down and you're knocked out.
If you have a pilot ISO on your intercom don't be afraid to use it. I suppose having one wild kid asking non-stop questions is probably easier than having three
I usually try to talk about some of the instruments. They usually like to know how high they are and how fast they're going.
When you get to your altitude and trimmed up let them fly.
Definitely let them help you spot airplanes.
I will usually run cloudahoy and send them link to the track later.
Relax and have fun and do stay hydrated.
Each of my flight is usually 20 - 30 minutes.
After the flight you will have parents wanting pictures and you will sign the certificate and logbook.
Last month our chapter flew 82. I did seven flights with 20 YE's. You'll enjoy it.