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Inside this soft squishy, hopping creature is a delta robot, used in an unusual way. Instead of moving an end-effector to a precisely defined position, Gertie’s mechanism allows it to hop up and down or in any direction.

Alonso Martinez’s goal was to make a cute robot with lots of personality. Alonso’s experience in the Character Department at Pixar Animation Studios inspired him to use animation techniques to design Gertie’s personality.

Lookin’ good, Gertie. Keep on hopping!


This week marks the official launch of Make: Volume 39 — Robotics, which drops on newsstands the 27th. Be sure to grab a copy at a retailer near you, or subscribe online right now and never miss another issue.

We are celebrating with five days of robot-related articles, pictures, videos, reviews and projects. Tune into this space for Robot Week!


Andrew Terranova

Andrew Terranova

Andrew Terranova is an electrical engineer, writer and an electronics and robotics hobbyist. He is an active member of the Let’s Make Robots community, and handles public relations for the site.
Andrew has created and curated robotics exhibits for the Children’s Museum of Somerset County, NJ and taught robotics classes for the Kaleidoscope Learning Center in Blairstown, NJ and for a public primary school. Andrew is always looking for ways to engage makers and educators.