What is unicorn slime? You’ve obviously never seen an actual unicorn. If you had, you’d know EXACTLY what unicorn slime is. Unicorns aren’t all rainbows and glitter. The truth is, they’re pretty slimy! Unicorn slime is a fascinating substance with lots of scientific properties. That’s where this kit comes in. So, you want to play with unicorn slime and talk about science? You’re in luck, because you can — and will — do both of these things at the very same time. Get ready to get unicorn SLIMED!