🚀 go-pugleaf

Hi,

  I'm leading a group of people in a contraption building activity.
I'm looking for ideas for contraptions which exploit creativity and
innovation on the part of the participants.       

  The people(mostly adults from late teens to mid 20s) will be given
approximately one hour to design and build the contraption to see who
has built the most engineeringly sound device.  I'm looking for contraption
ideals which do not require expertise in any specific area of engineering,
and would be cheap and fun to build.

  Some contraptions that have been built before include:
    - a contraption to protect a raw egg from cracking when dropped
        from a fixed height
    - paper plane with largest wingspan which could fly the farthest
    - balloon powered cardboard cars with the longest range

  Anybody got some other neat ideals????

  Thanks in advance,

    Jeff