From NPR: "It has become a social media sensation and even led to a run on glue sales. We're talking slime — and not the green liquid Nickelodeon famously dumps on celebrities. And for many young people on YouTube, Instagram and Etsy, it's a moneymaker.

Of the more than 5 million posts on Instagram tagged with #slime, most depict brightly colored stuff filled with glitter and pigments of all kinds. So the slime of today is far more viscous and elaborate than that green liquid on Nickelodeon. Slime has become so popular that the American Chemical Society recently published a fact sheet about it including a detailed scientific explanation for how the magic happens." Check out the rest of NPR's story about the escalating popularity of goo here.

This week in 5th Grade we are using goo to learn about variables as a part of the scientific method. I'm partial to this recipe from the YouTube channel Get Crafty Crafty: