Sadly, Dr. E’s WeDo Challenges and Dr. E’s MINDSTORMS Challenges will no longer be posting new challenges. However, both websites will remain up so that you can continue to access the previous challenges and all of the wonderful submissions. Thank you to LEGO Education and to the Center for Engineering Education and Outreach at Tufts University for their years of support (and thank you to LEGO for their amazing robotics platforms). During the six years of WeDo challlenges and five years of MINDSTORMS challenges, we received almost 1000 submissions from around the world. The two websites had a total of 1266 registered users from 57 different countries. We were truly a global community! We have always been inspired and energized by the creativity and innovation shown by the Dr. E's Challenges community; while new challenges won't be posted moving forward, we hope that you continue doing awesome stuff in your homes, clubs, and classrooms and that you continue to share your projects with the world! Collaborating with all of you has been a joy and an inspiration. Thank you, The folks at Dr. E’s

Electric Cutting Board by Vaibhav and Udit

Photo Gallery
This electric chopping board used two motors.  

One motor to move the meat to the proper position.

The other motor to move the knife up and down.  

If we had more time, I am sure these two boys would have modified the knife to actually cut the toy meat.
YouTube Video
YouTube Video


  1. pbdclass

    WOW! Great job. That is a fantastic cutting board, i wish i had one. The use of multiple motors is very interesting. Keep it up

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