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

Magic Camera

Magic Camera: Build a magic camera in which pressing a lever or pushing a button makes a new picture display on the computer screen.

Number Counter: Change your camera to a counter. Every time the button is pushed, the number displayed on the screen increases by one.

Mystery Math: Change the number counter program to count by twos, sevens, or some other number. See if other people can guess the hidden addend.

Sample solution:

magic cam 1magic cam 2

Pressing the lever triggers the motion sensor, causing a new random picture to be displayed.

Number counter program, starts with zero:


Mystery counter program, counts by fours:

mystery counter

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