Put your 4D glasses on; Objects in Lineland and Flatland

In Edwin Abbott's Flatland, a creature living in the 2D world would be completely mind-boggled to see a sphere (from the 3D world) pass through town. Think of a sphere "falling through" a 2D plane/ table/ sheet, etc. When the sphere first comes into contact with this world, it's a dimensionless point. As it continues to fall thought, it is seen as a circle of increasing size (up to its center), then decreasing size just before being a point again and then finally disappearing. Similarly, a four-dimensional spatial cube passing through our world would start a point, then a cube that increases in size, then a point again just before disappearing.

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