I have also done this sorta stuff quite a lot in the past, for both school groups and adult community groups. The advice you have already received is good. I will add a few more thoughts.
1) Having a tracking scope is an advantage and a disadvantage for this type of show. The advantage is that it allows you to use higher powers and keep the object in the FOV. This is good for the moon and the planets. In a dob you need to use lower powers otherwise the kids continually lose the target.
The disadvantage is that the eq mount will get the eyepiece into higher more awkward positions for the kids. In this regard an 8" or 10" dob is a lot easier for them to use. Make sure you take a small set of steps to go with the eq mounted newt.
2) A green laser pointer is ESSENTIAL. That alone will keep 95% of the kids occupied and intrigued for 95% of the evening. Just don't let the kids play with the laser, you keep control of it.
3)If you have eyepieces with comfortable eye-relief these suit the kids a lot better than eyepieces with short eye-relief. Then again you can't use something you don't have.
4) Do the moon and Jupiter at medium power. Then do all the DSO's at medium to low power.
5) As others have said stay with the bright DSO's. 14th magnitude galaxies in an 8" scope aren't gonna WOW them.
Big Globs are good
Big Emission Nebula are good
Big bright open clusters are good
Bright and colourful double stars are good eg Albireo, Gamma Delphinus etc
CS and Good Luck !!! - John B