Magnetic spray transforms inanimate objects into minirobots - Science Magazine

The spray contains particles of iron, polyvinyl alcohol, and gluten, which combine with water to form sticky, magnetic skins, or “M-skins.” Thanks to the spray’s magnetic properties, the scientists managed to bring to life ordinary objects such as origami paper and cotton thread, according to a paper published last week in Science Robotics.

The researchers captured footage of the “millirobots” rolling, swimming, and walking—literally strutting their stuff.

But they also performed more purposeful tasks: simulated biomedical procedures.