Getting a little thing so wrong

One of a pair of toy dice, Made in China 

Dice have been around for over 4000 years. Modern dice have a logical arrangement of numbers. The numbers on opposing side always add up to seven. So you will find 1 and 6 on opposing sides, 2 and five, and 3 and 4.

And what do I see on this die? (Die being the singular of dice.) 3 and 4 on adjacent sides.

The other die in this pair, a red one, is fine. The numbers on opposing sides add up to 7.

But at least the manufacturer didn't make the bigger mistake. At least all of the numbers are only on the die once.