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

Category Archives: Cotton Ball Launcher

Cotton Ball Launcher

Goal: Cotton balls and marshmallows are too big for LEGO people to throw. Help them out by building a WeDo launcher. Design a machine to throw the cotton ball as far as possible. Or as high as possible. Or as accurately as possible. The choice is up to you. 

insect maxmia

Start date: March 1, 2014
Due date: March 31, 2014.

Rules: In your submission, tell us which goal you designed your launcher for–distance, height, or accuracy. Your launcher must use a LEGO motor. A sensor would be great, too, but is not mandatory. Your launcher can only be used for cotton balls or marshmallows–no hard objects! As always, multiple kits, additional LEGO pieces, and non-LEGO materials may be used, but only sensors and motors from the WeDo kit are fair game. Having trouble getting the power you need? Check out this snippet: Gears or this one: Motor Power and Direction.

Engineering Design Process: Engineering is about the process as much as the product. Tell us about designing your launcher. What worked? What didn’t? What changes did you make along the way?

Share your work in progress and your flops in the Drawing Board section. Go to Drawing Board


Submissions for Cotton Ball Launcher