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Treasure Mountain: Rocks, Minerals & the Rock Cycle Adventure

Free classroom Dig Kits. Every adventure on this page is free forever. The kits that go with them are $15 a student — and for every one sold we donate one to a school.

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Adventure 01 · Rocks, Minerals & the Rock Cycle · Grades 3–5

Treasure Mountain

A hollow mountain riddled with old mine works, where every tunnel cuts a different kind of rock and the deepest shaft opens into a crystal pocket. Six stops, six problems to put right, six Digs to recover. Free, no logins, no accounts. Led by Rockling, the Realm's hero Adventureling.

Assigning one stop

  • Every stop has its own address. Stop 4 is /pages/treasure-mountain#stop-4 — paste it straight into Google Classroom.
  • Progress is remembered on the device, so a class can do one stop a week and pick up where it left off.
  • Each stop runs 10–15 minutes. The finale needs all six done first.

The six stops

1. Granite GateIgneous cooled from melt. Sedimentary settled in layers. Metamorphic was changed by heat and pressure.2. Sandstone StairIn undisturbed layers the oldest is always at the bottom — it got there first.3. The Marble HallMarble is what happens to a soft, shelly rock when a mountain sits on it.4. The Watching VeinOne of these is so soft you can scratch it with a fingernail. One leaves a red mark. One shines like silk.5. Copper CathedralMohs runs 1 to 10. Talc is 1. Diamond is 10. Copper is soft — that's the whole problem.6. The Glow PocketThe clue is in its name. Fluorescence is named after it.

What the kit adds

The adventure is free and always will be. The Treasure Mountain kit adds the part a screen cannot do: six real specimens, six Digs that come sealed with the label scratched off, six Gemlings in a blind bag, and the printed map with Rockling on it. Finish a stop online and that location's Dig is yours to open for real.

Finished Treasure Mountain? The online adventure is the half you can do today. The other half is a real specimen in your hand — six of them, one per stop, sealed in a Dig with the label scratched off.

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Other Realms

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