It just struck him, as a prepper, that safety pins would be good to have. I agree. Besides the use they were made for, mending in an urgent situation, they are fun and handy to have.
She taught us to keep safety pins in the sewing and craft box for:
replace a zipper pull with a pin.
pin the end of a drawstring or elastic to feed through the casing of a skirt.
pin buttons together to keep matching sets or sizes together.
pin a pin in place to count off stitches in a crochet pattern.
A large safety pin can hold a diaper in place, keep your kilted skirt from blowing open or mend that falling hem till you can find a needle and thread.
Keep a couple in the med kit to fasten an ace bandage or to remove a splinter.
If you have a loose zipper that slides down when you are not looking, pin a safety pin under the pull to create a zipper stop.
I used this tip myself. I have thread on spindles not just spools. Adding a safety pin to the thread spindle allows me to use it as a thread guide with my spindle in a coffee mug on the floor.
You can use safety pins to bundle cords behind the computer desk.
Pin documents or stacks of paper together through the hole or use the pin to 'staple' documents.
When the hinge in the little jewelry box breaks, use a pin as the hinge pin.
Use the pin to hold a tiny piece still while you solder it. Beats soldering your fingers.
Shoes keep coming untied? pin the knot.
Pin balloons to a t-shirt and be a bunch of grapes next Halloween.
Pin the end of a spool of ribbon to the spool to keep it from unwinding in the craft box.
Make chain maille with safety pins. Sure, these 'look' like a crafty artsy fashion top. but add about a thousand more pins and it's chainmaille!