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

The Christmas Day Kitten

I have chosen a scene from the book The Christmas Day Kitten by James Herriot. In this scene, the kitten is fetching a ball and Mrs. Pickering with Dr. Herriot look at it. Dr. Herriot says that the cat is amazing!





  1. Kasia

    Hello Pavlinka! What a wonderful way of using gears and a toothed bar. I realy enjoy your film and I fell in love with yor little cat.

  2. bbratzel

    An ingenious use of double gear racks to move your kitten and ball! I love the scene you created. And you did an excellent job explaining your creation–in English!

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