These silicone molds – four of them ... It’s an amazing amount of work to make just one of these soft robots, but once the molds and masters are made, [Matthew] can pop out a soft robot ...

Prolific maker [Jan Mrázek] shared his process for casting soft silicone parts that nevertheless ... [Jan] 3D printed both the molds for the parts as well as the structural inserts.

Then they pour a silicone mixture into the mold, covering the chip ... meant just to show that such a soft robot can be made at all. This story was part of our January/February 2017 issue.