I got the tray a year before and saved it so I guess that part wasn't "free". This is a picture tutorial on how to make the little seedling "cups" out of toilet paper rolls. I feel like the pictures should be clear enough to teach you how to do it. If you have any questions please just email me or leave a comment. My 12 yo, and 8 yo helped me do this. Gardening is a big part of us being a frugal AND healthy family. We used to do plants, but realized it is so much cheaper and rewarding to do the gardening from seeds. We try to buy all organic seeds.