what to use to bond hard plastic item, when superglue doesn't work?

Bendy_House

As you say, it doesn't need to move.

Ok, this is what I'd do, I think. I'd get the epoxy, def, as it's useful stuff to have in any case - especially with kids in t'house. I'd then try a test for adherence on a hidden part of the device. If the epoxy sticks really well and is hard to pick or chip off, then go ahead. If it peels off cleanly without too much effort, I think I'd be inclined to look at a different solution.

If it sticks really well, then just glue the top section and not all the way down the red.

It'll probably come down to how well it sticks vs how careful you can be with the device...