Slime: What's the deal?
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Slime: What's the deal with the new gooey global craze?

9 May 2017 Last updated at 08:19 BST

Slime - it's gooey, it's sticky and it's slimy, of course!

Now, loads of you are making it at home with the help of how-to videos on social media.

But there are some worries that one ingredient you use to make it, called Borax, can cause a bit of a problem.

Watch Ayshah's report to find out more.

Pictures courtesy of Gillian Bower and Talisa Tossell