UNREAL Optical Illusion Gadgets

Explains how the mirror scope makes an object appear to float, without giving a firm verdict.

Impressed by a table that looks unable to hold itself up but carries weight on an elastic string.

Describes an app that uses the accelerometer and eye tracking to make 3D shapes appear to pop out of the phone screen.

Finds the magnetic levitation kit cool, though a bit fiddly to set up before it works.