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

Drum Machine

Nikita has built a „Drum machine” that can play a tambourine or a xylophone and also rings the bell. 


  1. fuglsang

    Wauw – what a great build. It kind of reminds me of old fashioned automata toys just in a much cooler and modern way.

  2. bbratzel

    What a wonderful use of cams to move your fingers! I especially like your fingers playing the xylophone. The bell is a nice addition too. Amazing job!

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