A one year art project!

Lisa and I have decided to do an art journal.  We will each do a weekly sketch on a postcard and post it to each other - me in Perth and her in the home counties.  This will start when I begin my student exchange in 10 days time.  We've exchanged home addresses and I'm feeling quite excited about a pictorial record of my year abroad and Lisa's year in the UK.  Both of us like receiving post through the letterbox, as opposed to email on the computer.  I've never done a project like this before.  I hope I can keep it up.  I wonder what will come up as our main themes for the year?