This took us all day and we got told a couple times that we would never be able to make money at the rate we were going, but it can be fun if you're a team to make it.
We purchased most of what we needed at Galleria market (http://www.galleriasm.com:8888/) place at 865 York Mills Rd, Toronto.
Our grocery list included: salmon sashimi, white tuna sashimi, avocado, roe, crab, shrimp tempura, rice wine vinegar, sushi rice, ginger, cucumber, cream cheese and then other veggies you want to add.
What worked well was putting Saran wrap on the bamboo mats, we also only had one mat so sometimes we covered a magazine in saran wrap. It was an adventure.
This is the video I used to make the caterpillar roll: