Academics
CrashPals
A crash lab for ages 6–8: two carts roll toward each other and clink together. Guess which way they roll after they bump — left, stop, or right — then watch! Chug the marmot shows the big idea: the cart with more push (how big × how fast) decides which way. On-device; nothing leaves your device.
▶ Play it nowBuilt for sittings of about 15 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.
Mentored by Chug
#0e7490 Characters who teach
Meet the cast
CrashPals has a tiny friendly crew who make force & motion something a six-year-old can hold: Chug the marmot runs the Bump Lab and asks you to guess before every bump; Hefty the bear pushes a big heavy cart and pushes hard even when he rolls slowly; Nippy the hare pushes a little cart and pushes hard because she zips along fast; and Clink the cricket links two carts when they meet, so they couple together and roll as one. Each friend shows ONE gentle idea about the push; everything is spoken, and there is no way to lose.
Chug
Chug the marmot who runs the Bump Lab - counts the push (how big x how fast) and asks you to guess before every bump
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Hefty
Hefty the bear - pushes a big heavy cart, so pushes hard even when slow, because being BIG adds to the push (mass)
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Nippy
Nippy the hare - pushes a little cart, so pushes hard even when small, because being FAST adds to the push (speed)
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Clink
Clink the cricket - the coupler: when two carts bump he links them so they clink together and roll as one (the pushes add up)
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Browse all chapters → · What's distributed-narrative methodology? →
What's inside
Learning goal
A crash lab for ages 6–8: two carts roll toward each other and clink together. Guess which way they roll after they bump — left, stop, or right — then watch! Chug the marmot shows the big idea: the cart with more push (how big × how fast) decides which way. On-device; nothing leaves your device.
Mentored by Chug — no data leaves the device.
How CrashPals 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