Spark & Anvil Privacy
A friendly cartoon kid detective in a deerstalker cap examining clues with a magnifying glass in a cozy study, an evidence board and case files around them

SleuthLab

Every case has one right answer, and the evidence proves it. Search the scene for clues, run them through the forensics lab, match a fingerprint, then make your accusation — deduce who did it, one case at a time.

Open a case Match a print

Start here

Case Files Search the scene, match each clue to a suspect, then make your accusation — 10 single-solution cases. Fingerprint Lab Compare ridge patterns — loop, whorl, arch — and match the print to the right suspect. Build the Case Lay out the evidence in order — which fact leads to which, all the way to the culprit. Witness Stand Weigh what each witness says — spot the contradiction the evidence exposes.
Brain Break Take a quiet moment between cases — a fun brain-teaser or a short breather. Brain breaks help you remember what you learn.

All activities

Work the case

Case Files Search the scene for clues, match each one to a suspect in the lab, then accuse — every case has one right answer. Fingerprint Lab Compare ridge patterns — loop, whorl, arch — and match the crime-scene print to a suspect. Build the Case Chain the evidence in order — which fact forces the next — all the way to the culprit. Witness Stand Weigh what each witness says and spot the statement the physical evidence contradicts. The Deduction Grid A classic logic grid — read the clues, mark ✓/✗, watch a match cross out its row and column, and deduce the one right answer. No guessing, pure deduction.

Learn & practice

Mixed Practice A short round across the kits you have played — brought back to make it stick. SleuthLab Sprint Race your OWN best on what you already know. Timer optional, no penalty for a miss. Trick Questions Brain-teasers with a twist — spot why the obvious answer is a trap. Teach the Cast Teach a forensic method to a cast member still learning it — teaching makes it stick.

Play together

Sleuth Duel 2–4 detectives take turns on one device — same questions, highest first-try score wins. Adventure Map A progression trail through every kit — clear each stop of real casework, then move on. Progress Your levels, days active, and how each forensic skill is coming along — saved on this device.
Concept Kits — 16 kits of forensic reasoning (400 questions)

From forensic basics through fingerprints, trace evidence, digital forensics, and building a case — a short round with a hint whenever you get stuck. Progress stays on this device.

Kit 1: Introduction to Forensic Science Forensic Basics · 4-5 · 25 questions Kit 2: Fingerprint Analysis Fingerprints · 4-5 · 25 questions Kit 3: Trace Evidence Trace Evidence · 5-6 · 25 questions Kit 4: Chemical Evidence Trace Evidence · 5-6 · 25 questions Kit 5: Document Analysis Document Analysis · 5-6 · 25 questions Kit 6: Biological Evidence Logical Deduction · 6-7 · 25 questions Kit 7: Digital Forensics Digital Forensics · 6-7 · 25 questions Kit 8: Case Analysis and Scientific Method Building a Case · 7-8 · 25 questions Kit 9: Observation Skills Observation & Inference · 4-8 · 25 questions Kit 10: Logical Deduction Logical Deduction · 4-8 · 25 questions Kit 11: Forensic Science Observation & Inference · 4-8 · 25 questions Kit 12: Mystery Narrative Observation & Inference · 4-8 · 25 questions Kit 13: Cross-Topic Connections Building a Case · 5-6 · 25 questions Kit 14: Real-World Applications Building a Case · 6-7 · 25 questions Kit 15: Misconceptions & Reasoning Logical Deduction · 6-7 · 25 questions Kit 16: Advanced Synthesis Building a Case · 7-8 · 25 questions

More ways to play

Quiz Arena Sleuth Run How Many? Crime-Lab Bot Daily Case Nine Detectives

Same idea, another world

Something you practice here shows up somewhere else too — that's real learning that travels.

Ruling out every suspect the evidence contradicts until one is left is the same elimination that cracks a hidden code from its clues. The shared idea: deduction by elimination — ruling out every suspect the evidence contradicts until one remains, the same elimination that cracks a hidden code from its feedback Try DeduceQuest →
SleuthLab mascot

Meet the cast — the characters who teach this

Each one stands for an idea you’ll practice. Tap a character to read their illustrated story and hear their audio drama.

Ensemble stories — the cast together

Explore all the stories →

What next? Pick a door

Chosen from what this app is about. What you open is remembered on this device only.

📚 Books for SleuthLab

Read the story, print a workbook, or color the cast — free PDFs to read offline or print at home.

Browse all books →

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