Your Clothes Are Hiding a Secret. Can You Crack It?
CircFibre turns every t-shirt, hoodie, and pair of leggings into a real forensic mystery. Test the fibers, decode the clues, and solve what it's really made of — before it ends up in a landfill.
Four steps. One verdict.
Every case follows the same trail — from evidence, to analysis, to a signed verdict in the Case File.
Collect Your Evidence
Pick a fabric sample from an old t-shirt, hoodie, or pair of leggings.
Run the Analysis
Place the sample in the enclosed SafeCheck chamber and start the test.
Decode the Clues
Read the ash, char, or melted-bead evidence using the Case File booklet.
Crack the Case
Identify the fabric, log the verdict, and earn your Detective Badge.
Everything a fabric detective needs.
The SafeCheck Analyzer
The enclosed fabric-testing device — no open flame exposure.
The Case File
Illustrated booklet with clues, verdict sheets, and 4 fabric dossiers.
Evidence Goggles
Kid-sized safety eyewear for every investigation.
Handler Gloves
Soft, protective gloves for handling burnt evidence.
A Foldout Detective Certificate — signed by the kid who cracked all 4 cases.
Printable and included in every kit. Awarded once your young investigator has correctly identified all four mystery fabrics.
Safe by design, not by disclaimer.
CircFibre was engineered so kids can run a real materials test without ever touching an open flame. Here's exactly what makes it safe.
Enclosed test chamber
The SafeCheck Analyzer keeps every test sealed. No open flame exposure.
Child-safe materials
Non-toxic components, tested and certified for ages 8 and up.
Adult supervision recommended
Designed to run alongside a parent or guardian — the Case File shows how.
They think they're cracking a case. They're actually learning textile science.
Every mystery kids solve teaches them how fibers behave, why polyester sheds microplastics, and what happens when clothes get thrown out. Real STEM content, real sustainability — wrapped in a game they actually want to play.
Ready to open your first case?
One kit. Four mystery fabrics. A signed Detective Certificate when it's cracked.
No payment today — waitlist members lock in the $24.99 early-bird price · Estimated delivery: December 2026 · Refundable anytime before shipping