Robots made from natural organisms
Xenobots. These people are sick!
https://interestingengineering.com/tiny-living-robots-made-from-frog-cells-could-be-swimming-inside-you-soon
Here's the vid explanation.
"In order to create them, researchers took stem cells from the embryos of African frogs. After incubating them, they used extremely tiny tools to cut them apart. The parts were assembled into the designs created in the supercomputer.
This is truly extraordinary since scientists basically meshed organic material together to create a life-form that didn't exist in nature before