COOL STUFF
You choose a crayon since it can usually always write, and if covered in a piece of paper, it won’t destroy the other items in your wallet. Some people keep a crayon in their wallets to help them keep their cards straight.
Wallets are vulnerable to folding, altering the original shape of any credit or ID cards contained within. On the other hand, the wallet keeps its shape by holding a crayon inside, preventing anything from bending.