Don't eat potatoes that have started to go a bit green, because the change in colour indicates that the skin now contains poison that's similar to arsenic. I read that on the interweb somewhere, which I'm sure you'll agree is a very reputable source of information.
When your tubers turn radioactive in colour and poisonous in composition, they are no longer fit for human consumption. So why not turn them into a Christmas scene, as the greengrocers in East Wittering has done?
(Although Mr Green Santa Potatohead cannot talk, I can read his facial expression and it's clear that he also wants us all to consider his friend the chili pepper - pictured to his left - as a candidate to be upcycled into a nose for your next snowman.)