Pj: maybe this will help
This is a great tutorial: https://youtu.be/0m69EiNy77s
Put in garden perimeter, to ward off squirrels and rabbits.
Take out if it’s going to rain a lot.
Some people put them all together in a terry cloth bag, then use that in the shower or bath
I wet 3 bars and stick them together to use like a regular sized bar. When my new “bar” starts getting smaller, I wet and stick a new bar to it. I was on the road for work for over ten years and have used this method forever. I haven’t purchased soap since!
You can rebatch them
I always have extra netting or nylon around the house. I cut a large square of it, lays the soap bars in the center and bring the ends up and secure them with a rubber band. I keep the "soap bag" at my laundry sink to pre-treat stains or work-in stain remover and we use it after gardening to wash our hands, After using it, i put it under hot water and rub it around to remove any dirt left on the bag. I have done this for 40 years, the soap bags last a good long time and no wasted soap.
Melt them down and make them into a bigger piece of soap
Gather a few of them together in a square of nylon netting as described above. But I use it to keep my tub, sink, and tile clean. No need to purchase all those chemicals.
I replace the small slivers of bar soap with a large bar of soap. You can find them most grocery stores.
Add to storage boxes and chest for a bit of pleasant scent.