Yesterday's post Child's Play displayed a cube formed
by a Hasse diagram of the 8 subsets of a 3-set.*

This suggests a review of a post from last January—

IMAGE- Tesseract (i.e., hypercube) formed by a Hasse diagram of the 16 subsets of a 4-element set

* See a comment on yesterday's post relating it to earlier,
  very similar, remarks by Margaret Masterman.
  I was unaware yesterday that those remarks exist.