I think a good gadget would be to have a system that would stop time for everything around you for a certain amount of time.
Enough time to be able to investigate without the risk of being discovered, and in the case of being discovered to be able to activate it to be able to leave the place without any damage.
It should be as easy to operate as a button on a smartwatch so that it would go unnoticed. And even more so if it has a child's view of the screen.
HAHAHAHA