STEM
ErrataQuest
The Hall of Good Mistakes. Each room holds an idea careful people believed for good reasons. Read why it made sense, then pick the observation that broke it. Two rooms hold right ideas that were doubted, and one a great scientist's error. Every room cites a source. Ages 9–14.
▶ Play it nowBuilt for sittings of about 20 minutes on the screen. That is our design budget, not a measurement.
Meet your mentor
Every Spark & Anvil app has a friendly mentor character that demonstrates, asks, and patiently scaffolds learning.
#2e180b Characters who teach
Meet the cast
ErrataQuest has two guides to the Hall of Good Mistakes. Erratta shows why an old idea made sense, and Wrongwell finds the clue that broke it.
Erratta
shows each old idea with respect and explains why careful people believed it
Wrongwell
A detective - finds the one observation an idea could not explain
What's inside
Learning goal
The Hall of Good Mistakes. Each room holds an idea careful people believed for good reasons. Read why it made sense, then pick the observation that broke it. Two rooms hold right ideas that were doubted, and one a great scientist's error. Every room cites a source. Ages 9–14.
How ErrataQuest handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages