Not my contest, just the “signal booster”.
From their website though, looks like what they are wanting is:
WHAT WE WILL NEED
When completing the entry form, you will be asked for the following information:
• The name of your design
• The idea behind your design
• A single horizontal 8.5” x 11” page with illustration(s) of your design. JPEG or PDF formats only.
You may submit one file per design. The file can include one or more illustrations on a single sheet. It should not include personal information such as your name or contact information.
• You may submit up to two designs in total. Please complete one entry form for each design.
Online Entry Form
… and I say, yah, post pictures here!