Hands On STEM

activities Dec 05, 2023

We're getting a bit tired of vinegar and bicarb variations lately! With a KiwiCo kit we did a lot of new experiments with citric acid and a couple of other kitchen ingredients recently.  Then I looked on Twinkl last week and found this experiment we had never tried before.

We used milk and vinegar to make 'plastic'. It's actually curds, like cheese! But we chatted about casein and molecule chains and squished our meagre curds (we expected more from 1 cup milk - maybe it was our milk?) into a modelling substance that Zeah coloured yellow and added glitter to (now it looks like rubbery, sparkly cheese!) She cut an angel and made a bead and they're drying on the kitchen bench. I feel like we might attract bugs?

The whole process was interesting and took a bit more skill and patience than our usual mix-and-watch experiments, so I'll be looking for more to do with kitchen ingredients in the coming weeks.
Check out the instructions for this one here.


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