According to Soinc.org:
Short Event Description: At the beginning of the event, teams will be given a bag of building materials and instructions for designing and building a device that can be tested.
I've never competed in this event before but the Wiki page
may be able to help you.
2014 States: R&M-4th, Sounds of Music-5th
2015 States: Crime Busters-2nd, Green Gen-2nd
2015 Nationals: Green Generation-1st
2015 Swap Meet: Cheese Hat
2016 States: Green Gen-1st, Exp Des-5th, Scrambler-6th
2016 Nationals: Green Generation-1st