Some things that you can learn from TPT (and that I have) is: The Game of Life principle, the relationship between Kelvin and Degrees Celcius, basic coding/electronics logic (IF, AND, NOT, etc.), and the melting points of various things. All in all, I'd say the game is quite educational, if not completely acurate. Also, if you play TPT, it gives you the perfect opportunity to make dumb jokes. My personal favorite goes something like this:
>Person: "Can you [insert sciency question]?"
>Me: "Only if you enable ambient heat mode."
I usually just make a random mixture of chemicals and watch it react XD
So I'm not the only one who uses G+? Yay me! XD