Did you know you could turn milk into plastic? I didn’t. I had no idea!
I did know that you can turn cream into butter, which is just what I was planning on doing with my Kindergarteners last week.
There I was armed with gallons of cream (which as it turns out was waaaay more cream than needed) when one of my lovely colleagues said, “Oh! Are you making plastic?”
I looked at her as if she were insane and said, no – this is cream.
She then smiled and said, “Oh, I thought it was milk” and started to walk away.
As if you could walk away after a sentence like that!
I quickly chased after her and got all the details on how to turn milk into plastic. Turns out – she’s not insane! You really can!
And best of all – you only need to add vinegar!
Good news friends, I have worked out all the kinks, done this science experiment more than a few times (it’s that awesome), and have all the details just for you!
You can turn milk into plastic in literally minutes with only milk and vinegar – and it is awesome.
First of all, take 1 cup of milk and warm it in the microwave for about 1.5 minutes (you want it hot, but not boiling)
Next, stir in 4 tablespoons of vinegar.
The milk will start to clump as the acid in the vinegar breaks down the protein in the milk. Stir for about 1 minute
Then, strain the milk through a strainer. All the clumps will stay in the strainer and really push on them to get all the liquid out.
Finally, transfer it to some paper towels and continue to press all the liquid out of the plastic milk. You can then shape it and colour it if you wish.
We used a cookie cutter and then added a few drops of food colouring (sometimes we left it white too).
We set them aside to dry for a good long while – about 2 nights – and then they were ready! Hard as could be and ready to be hung up in a window, on a door, or used to decorate a Christmas tree! (You know, if it wasn’t March)
My kids just loved this science experiment, I hope yours will too!
I hope you have a lovely week friends, thank you for reading.