TIM a tablescape can be very simple or very elaborate. If you are going to have a few big dishes in the centre of the table you just keep the table simple so you have room. Often it is really just about coordinating the placemats, napkins, a table runner and a few decorative items. It's lots of fun to play around with simple ideas.
I am thinking maybe the tissues boxes for a bit of humour, or a uni style theme, or maybe an ANU theme if they have certain colours, or just Bon Voyage.
I love the pom poms Abigail. You can buy them on the internet in lots of places. Eli may even sell them on her website Spotty Napkin. I would use them if I head something to hang them off but we have cathedral ceilings in the dining room and downlights. Do show us if you ever use them.