Author(s): Octavian Horia Minda


SubjectGreen Biotechnology 
Age of students8-11
Preparation time30Minutes
Teaching time60Minutes
Online teaching material (links for online material)
Offline teaching materialCorn flourWaterCooking oilA measuring spoonA microwaveA microwavable containerAn adult (if required – to help with the microwaving!)

Aim of the lesson

By the end of this lesson students will: 

  • be able to make own biodegradable plastic or “bioplastic” made from natural materials, using a few simple ingredients


Describe here in detail all the activities during the lesson and the time they require. Remember, that your lesson plan needs to revolve around the topic of bioeconomy.

Name of activityProcedureTime
IntroductionNew plastics are being created that use natural materials like corn or chicken feathers, which will break down much more quickly in the environment.    Many of them are experimental at the moment and there’s still a long way to go. For example, many dissolve in water, so they’re not great for holding liquids! But in the future, making plastic that breaks down naturally in the environment should be possible5 min
InstructionsYou can make as much as you like, but the proportions of ingredients to use are 1 tablespoon of cornflour to 1.5 tablespoons of water to 4 drops of cooking oil.Xmin
Mix the ingredients well in your microwaveable container until you have a milky liquid.X min
Put the mixture in the microwave and give it about 30 seconds on high. It should start to   bubble and become slightly transparent. If you have made a larger amount of mixture, you may have to heat it for longer to get it to bubble.Keep watching and don’t let the mixture start to burn! Xmin
Knead the plastic until it feels like play dough. You can now cut or mould it into the shape you wantXmin
Leave it to cure for 24 – 48 hours. It should then be solid and maintain its shape. If you’d like to make coloured bioplastic, try adding food colouring to your mixture before microwaving. Xmin


Describe here the assessment method of the lesson, if any. For example, if you plan on assessing your students with a quiz, include here questions and answer options with color-coding the correct answers.

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