https://www.amazon.com/JSAUX-Headphone-Splitter-Nylon-Braided-Playstation/dp/B088686SKJ/
https://www.amazon.com/Headphone-Splitter-Syncwire-Nylon-Braided-Stereo/dp/B07431YDWM/
"Headphone Splitter 3.5mm, Audio Splitter 2 Female to 1 Male, Dual Headphone Adapter"
But everytime I try the superglue doesn't hold up and the kids are able to unplug it and get volume coming out of their tablets. I'm looking for a way to make it absolutely impossible for them to use their device without headphones. Anyone achieve this with some special type of super glue?
Be the adult/parent here. Tell them they must, always, use headphones. And that if they do not comply they will lose the ipad for X hours (potentially increasing amounts of X for each subsequent infraction).
Then, actually apply the stated punishment when they test the boundaries.
Because they are just as capable of free will as you and want to win at least as badly as you do.
If you can't figure out how to work through it together, that's on you as the adult. It's not on the child.
Good luck.
If parents in general had the ability to manage their devices, that'd just makes busses restaurants flights and everything else full of so much less din.
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You could fold the cable to the back of the unti, and epoxy the middle of the cable (or get a 3M cable-tie-grommit) and secur the cable to the case of the unit, as opposed to gluing it INTO the port. -- Basically make the splitter connected to the case, so its always available to use.
But also follow the parenting advice below.