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Steve Spangler Science® String Slime™ Starter Set

Steve Spangler Science®
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Ages 6+ / Grades 1+
WARNING: CHOKING HAZARD – Small parts. Not for children under 3 years.
  • Mix-up the Activator Solution and squirt your favorite String Slime™ color into the liquid. The instant the two liquids touch, you get solid String Slime. It’s that easy!
  • Explore the science of polymers with this exciting kit
  • No glue, no borax
  • Amazing fluorescent colors won’t stain your hands
  • Blue and Yellow String Slime™ colors – Mix to make green"

Explore the Science of Building Polymers by Cross-linking Long Chains of Molecules

Amazing fluorescent colors won’t stain your hands

This is slime like you’ve never seen before. No glue… no Borax… no messy mixing… just amazing! Just mix-up the Activator solution and squirt your favorite String Slime color into the liquid. The instant the two liquids touch, you get solid String Slime.
Remove the strings from the bowl and you’re ready to play. Snap the string in half to reveal the gooey center. Just dip the ends into the Activator solution to seal it back up.

What does it teach?

Explore the science of building polymers by cross-linking long chains of molecules. The process of making String Slime is faster and easier than the classic slime recipe and it happens the very second the two liquids mix. Truly amazing!

What age is this activity best suited?

This activity is great for all ages. Both String Slime liquid and the Activator powder is safe to use as directed with adult supervision. Use String Slime as an introduction to chemical changes for young children while older children will learn about polymer science through the process of cross-linking long chains of molecules together.

You Won’t Believe Your Eyes!

Best of all, String Slime won’t stain your hands. It’s safe to touch, twist, twirl and explore the science of polymers.

Use Under a Black Light!

Our special fluorescent colors will blow your mind under blacklight. Collect your favorite colors for the ultimate slime experience.

Instruction Card Included with 3 Experiments

Making String Slime
It’s All in the Squeeze
Color-Me-Green String Slime

What’s Included?

String Slime™ Activator Powder 0.35 oz (10 g)
Yellow, and Blue String Slime™ (3.4 fl oz. / 120 mL) each
1 Plastic Squirt Tube
1 Plastic Tank
Instruction Cards
Recommended ages 6+ with adult supervision.


Brand Name
Steve Spangler Science®
Age / Grade
Ages 6+ / Grades 1+
Assembly Required
Steve Spangler Science

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