How to Make an Incubator to Ferment Natto and Yoghurt

A small light bulb powered incubator provides a convenient and consistent enclosed room temperature for fermenting soy beans and milk, transforming them into nutritious Natto and Yoghurt. This video presentation shows you how to convert a simple polystyrene box into a food incubator. It also encourages the recycling of used polystyrene. Enjoy the show!

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