hjhutchinson

Instructables

• 

  A Simple Way to See Color Addition

  87
• 

  Speed of Sound Calculator Using Old Earbuds

  2 180
• 

  Make Doppler Effect Demonstrators

  1 231
• 

  Https://www.instructables.com/id/Spin-Art-Table-from-a-Window-Fan/

  1 76
• 

  Https://www.instructables.com/id/Light-Up-LED-Cards/

  1 96