Rube Goldberg "Bar of Soap" Challenge


Participants will build a machine that drops a bar of soap into someone's hand.


  1. Students can enter individually or as a team of up to four students.

  2. Entry must drop a bar of soap into someone's hand using 10-20 steps.

  3. Entry must be made from everyday objects.  

  4. Video submissions should show every step in the homemade chain-reaction machine in a single, unedited pass.



Submit the entry as a PDF via this submission link by March 31, 2021. The winner of the monthly challenge will be featured as the Outstanding Member of the Month on OKTSA social media.



Click here for a fun Rube Goldberg example!