There is no way that the 2 thick, black lines are the same height, right? Let's look a little further into it and see.
Here's a video that showcases and explains the full effect of the illusion:
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Signing UpStep 1Materials
1) A piece of 8.5 x 11 paper(cut to 8.5" x 8.5")
2) Ruler
3) Pen
4) Two crayons or colored pencils(preferably orange and yellow)
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