ThunderBox
LE

That's only one use for it, it's got many uses - those self driving cars use it for avoiding obstacles, and there's loads of other things it's used in such as robotics, 3D scans of rooms etc.
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Lidar - Wikipedia
en.wikipedia.org
Also it's cheap now - you can buy Lidar sensors that do 360 degrees for around about £90 now, they can be used with DIY projects using Arduino, Rapsberry PI etc.
If you want to make a toy remote car for using in your house, you can get lidar sensors for about £20 - (to stop it driving into walls/furniture etc).
I might glue some to the wife’s car, £20 you say....