Have you seen the video going around that shows a little girl talking about how she couldn't get a conventionally grown potato to grow and even the organic one was kinda puny? It isn't until she picks one up at a certified organic market that they get a lush potato plant.
This seems like a simple project for my 3.5 year old and we started it today. I haven't been to a farmers market recently but I did manage to pick up an organic sweet potato and a conventional one at our local grocery store.
Here is the original video. Clearly she has been coached but regardless of the message's delivery I am excited to see if we get the same results.
If you want some additional reading check out:
Residue Levels of Chlorpropham in Individual Tubers and Composite Samples of Postharvest-Treated Potatoes