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

Trained Wedo Dog


This robot dog named Twitchy, is a well trained pet you don't have to feed or walk. He responds to voice and hand commands, but can be a bit grumpy if you touch his tail!


 This is Twitchy when he sits. I can make him lie down, and bark.  His eyes glow red like this if you touch his tail.  He hates when you touch his tail! Everything is lego except for his ears.  I made them out of duct tape.


First I used the sound sensor to trigger the barking.  I recorded my own dog barking.  Next I used the motion sensor to activate the motor to make him lay down. It looks like I'm touching him in the video but I'm not, just moving my hand close to the sensor.  I use this same hand command on my real live dog!  There are only two inputs on my wedo, so to make his eyes glow red when you move the on/off switch that is his tail, I had to use my lego power functions. Thanks for watching!


 This is my program.  I wanted to add to it but there were only two inputs,  so I added the tail switch to activate the light up eyes with my lego powerfunctions.

1 Comment

  1. barbarab

    How clever! I love that touching his tail makes him “see red.” Great use of a switch. I also love that you recorded your own dog for Twitchy’s bark.

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