Make plastic from milk! Nanogirl's Great Science Adventures 

Glad it worked for you!

Moira DeBruin I’m so glad you love it 😍

It's not a very sturdy plastic and easily breaks. Also it deforms a lot during the drying process. There are other formulas, using formaldehyde, making it more stable und more useful, but creating those is not as simple anymore. And even those are only useful up to a size of a button. There are good reasons why real plastic is used in most cases.

Yes you are right

Yes any acid

The whey is dissolved into that liquid, btw. The liquid contains everything that remained from extracting the casein from the milk, if it's whole milk (good luck getting actual whole milk these days) it would consist of mostly water, carbs (like lactose), fat, minerals and some other vitamins and proteins that remained water soluble and didn't get tangled up in the casein protein when extracting it, like whey.

Is that normal?

Rheif ogle hiiii!

It is testing what happens when we get vinegar into milk. I agree its methodology could be improved but we don't need to be that pedantic to learn things.

why the sad face?