Xúc Xắc Một Mặt

This die always rolls a 1.   It's perfect when the outcome is a foregone conclusion, but you still want to roll for it anyway.

It prints in two parts.  You glue three 2x6 magnets inside or glue a few washers inside.  Then glue the two sides together.  

Do not eat!  If you have kids or dogs who might try to swallow this, you could print it at 2x or 3x scale so it won't be a choking hazard.