Thanks for the suggestion but that doesn't help if my copy of electrum is compromised. The program might ignore the entropy I provide and make a predictable seed instead.

I'm looking for a way like I described in my first post where you don't even need to use a computer to generate the seed (use the physical world only).

Is there a method like this except for Electrum 2.x 13 word seeds?

Method for Electrum 1.x 12 word seeds:
https://bitcointalk.org/index.php?topic=878614.0

I'm basically looking for a way to make electrum seeds without having to trust a computer. I'm worried that my copy of electrum could be compromised and only generate predictable seeds.