You can visualize them as a 1x1x1 cube plus a
2x2x2 cube plus a 3x3x3 cube plus a 4x4x4 cube
and count all the blocks up and you get 100.
1 + 8 + 27 + 64 = 100
64 = 4 x 4 x 4
27 = 3 x 3 x 3
8 = 2 x 2 x 2
1 = 1 x 1 x 1
There are 5 squares, each square has 4 sides which have 5 points each. Except the squares aren't really squares, and the sides aren't really sides.
So its a Not-quite-squari-nor-sidi-agon
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