2014
![Girl looking at objects in a beaker filled with liquid that appear to be invisible](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/11070/invisibility_2.jpg?h=e4c0da04&itok=Nb5ewATQ)
Exploring Properties - Invisibility
In this activity, learners investigate how glass objects can be "hidden" in some liquids through refraction.
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![Two young learners and facilitator push down on a red magnet being repelled by a magnetic black base](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2022-03/20121029-2100.jpg?h=265e640d&itok=-OKQDw_y)
Exploring Products - Computer Hard Drives
In this activity, learners use floating ring magnets to store data and model how computer hard drives works.
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![Memory Metal activity components including signs, guides, hair dryer, memory metal, and bucket.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/memory_metal.jpg?h=6b4e2299&itok=GfNVJCAu)
Exploring Materials - Memory Metal
In this activity, learners compare the properties of a memory metal spring to an ordinary spring.
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![An overhead shot of a learner holding and comparing different theoretical technologies summarized on sheets of paper](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2022-02/You_Decide_1.jpg?h=86c214ca&itok=hPZ_XGXj)
Exploring Nano & Society - You Decide!
In this activity, learners sort and prioritize cards with new nanotechnologies according to their own values and the values of others.
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