I also attempted to use tablets for a while for my kids. On the upside, Domopad is a great interface that has so many more options than IndigoTouch.
Downside #1:Domopad is better for you or I, worse for kids.... you have the ability to do a lot more damage as you can access more parts of indigo than the touch app.
Downside #2: I was using Amazon tablets.... they added a button to the home screen of the devices that gives the user access to all your home automation stuff that you have controllable via the alexa plugin. Sounds neat, but you cant remove it and it isn't under parental control options.... so always there. I did not want my kids flicking lights on/off in my bedroom, so the fire tablets were returned. back to iOS.
From the domopad forum, this very topic was discussed.
https://forums.indigodomo.com/viewtopic.php?f=73&t=25741 (I checked to see if that was an option on that platform, spoiler alert... no).
So, yeah, a workaround hack circumvention will more than likely be the approach.