1) No specific symbol - that's just him having fun with the Egyptian hieroglyphics.
2) "The Dynamite of Unintended Consequences"
3) "The Flying Saucer of Possibility"
4) "The Pie of Opportunity"

Bizarro is famous for inserting hidden symbols in his comics. Take a look at the number after his signature - that's how many hidden symbols there are in the panel.

Take a closer look at the second panel ("Hieroglyic Spelling Bee") and see if you can also find The Inverted Bird, The Eyeball of Observation, and K2 (which refers to his children "Kermit" and "Krapuzar").

I can only find 4 in the first panel (out of 5): The dynamite, pie, eyeball, and alien. Where's the fifth hidden symbol?

Hah! That would be a deal we couldn't afford - international postage for sending packages from the United States to other countries is incredibly expensive. Strangely, the opposite is not true: I've seen postage from other countries to the United States be actually less than what I can pay to ship something from one side of town to another here.

Too late, Google has been an overlord for quite some time now ;)

I don't know specifically, but I think all of these "Sudoku"-type puzzles come from Euler's Latin Squares.

He's just trying to get you to go to the store on Black Friday, Miss C!

Whatever you do, don't go on a three hour tour.

Thanks for sharing your artwork, Joy! And thank you for reading Neatorama!