score:6
Physical Goods
There were many goods traded across routes with the domestication of the camel including silk, porcelain, spices, slaves, incense, and ivory. Here's a picture that I think you might find really useful:
Thought
The biggest "thing" (in my opinion) that was traded was actually religious thought. Hinduism, Buddhism, and Jainism were spread through not just missionaries, but by traders too. Later on, Islam spread the same way.
Source for Map: http://maritimeasia.ws/maritimelanka/images/maps/productroutes_700x522.jpg Note: This map and information is about 3 BCE and onward (during medieval periods).