These were my first attempts at making a whip. Surprisingly they actually cracked a little:

The white one a the bottom is just a jumping rope cord attached to a piece of wood as a handle.
The black one is just a four plait made with braided half inch wide nylon webbing, empty on the inside.
The brown ones, now they are made from leather and if I remember right they had more layers of leather underneath. They are made from an old chrome tanned leather long coat. I had no idea at the time about cutting strands, so the strips were around 3 feet long, sewn together to achieve the length I wanted. It was a huge effort, harder than making an actual whip, once you have a bit of knowledge.
Hope you enjoyed!
Cheers,
Bear