This step-by-step video guide is a helpful introduction showing teachers and parents how to have fun with science by making invisible ink from lemon juice mixed with water. Learners will then have the opportunity to write secret messages to their friends. Finally, they will use heat to reveal the messages.
This fun STEM challenge is aimed at primary school children.
Download the free activity sheets and supporting resources on our resource page for more detailed instructions, teachers notes and for optional extension work. These are free to download, and all the documents are fully editable, so you can tailor them to your students’ and your schools’ needs.
This exercise will take approximately 40-60 minutes to complete.
Tools/resources required
• Lemons
• Water
• Small bowls
• Cotton buds/paint brushes
• White paper
• Hairdryer or lamp
Please share your classroom learning highlights with us @IETeducation.
About IET Education
We support STEM teachers by providing a range of resources linked to the UK curriculum and partnering with organisations to create experiences that inspire teachers and students alike. Our campaigns are for children aged 4 to 19 years and aim to bring their imaginations alive to inspire them to engineer a better world in the future.
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