Its nice to see the youngins doing their thing....
I have never been a fan of "slap pad work", no matter who does it, but that'sjust me.
You should actually aim for the kids head when you are working on their ducking and try to have them put a little bit more on their combos and not just tap the mitts.
I think that, unless you have a solid core in grappling:
BB in Judo, Purple in BJJ or goo experience in freestyle and G-R wrestling, that you and yours would be better served to bring someone in for teaching grappling.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !