This set of activities explores how different products can be formulated from cover crops, in this case different formulations of ink from vegetable oils.
Module 2C: Cover Crop Products
Cover Crop Science
An Inquiry-based Project Book for 4-H Youth
This looks very nice and should be easily able to be conducted by most anyone. I like how the options for different oils are outline that it is not a one size fits all method.
Looks like any early elementary-middle school student could learn from this experiment worksheet.