The round dungeon room smells of damp stone and warm cinnamon, as if someone once kept a kitchen nearby. Three broad stone plaques glow with blue-green light beside a sealed door. Each plaque shows a multiplication question and a tidy array of bright dots. Beneath them, three heavy dials click softly as they turn; when a dial passes a correct number, its plaque glows brighter, while a wrong number makes the dots gently dim.
You step into a round stone chamber. Three glowing plaques show rows of bright dots beside number puzzles, and three chunky dials wait beneath them. A sealed door stands beyond. Cool blue light pulses across the room, and a little pile of smooth counting stones rests on a ledge.
Let the players inspect the dot arrays and turn the dials. The counting stones can be moved into groups. Explain that the plaques and dials match by position, and that the lights give friendly feedback. This is a learning puzzle, so invite the child to count or draw.
Give the table time to count and talk together. Offer tier 1 if they overlook the rows, tier 2 if they need a method, and tier 3 if they are stuck on the facts. Keep the lights gentle; do not add a combat timer.
The round dungeon room smells of damp stone and warm cinnamon, as if someone once kept a kitchen nearby. Three broad stone plaques glow with blue-green light beside a sealed door. Each plaque shows a multiplication question and a tidy array of bright dots. Beneath them, three heavy dials click softly as they turn; when a dial passes a correct number, its plaque glows brighter, while a wrong number makes the dots gently dim.
The room's plaques, matching dials, and loose counting stones are visible as soon as the party enters. A careful look reveals that each question has its own dial and that the dots are arranged in equal groups.
Turn each dial to the answer for the plaque above it.
Left plaque: 3 × 4 = ?
● ● ● ●
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Middle plaque: 2 × 5 = ?
● ● ● ● ●
● ● ● ● ●
Right plaque: 3 × 3 = ?
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When all three dials are set, press the round stone.
The party reads each plaque and sets the dial directly beneath it to the total shown by the multiplication problem. The dot arrays are visual support: count the dots, count them in equal groups, or use the loose stones to build the groups. When all three dials show their correct totals, press the central stone to open the door. A correct individual dial glows steadily; an incorrect setting makes its plaque dim briefly. If the central stone is pressed with any wrong answer, the dials reset harmlessly so the party can try again.
The puzzle activates when someone turns any answer dial or touches the central stone. The plaques glow, and the dials become easy to turn.
| DC | Check | What it gives |
|---|---|---|
| 12 | Investigation | Notice that the carved dots are arranged in equal rows and that each dial corresponds to one plaque. |
| 12 | Arcana | Recognize that the ward checks all three dials together and gives harmless feedback when an answer is wrong. |
| No check required | Player reasoning | Use the pictured groups, count aloud, or work out the multiplication facts. The puzzle is intended to be solved by the players, not gated behind a roll. |
No hint given yet.
The three dials click into place together. Their lights join into a bright ring, and the stone door opens with a low, friendly chime.
The dials reset with a soft clunk, and a harmless puff of sparkling dust drifts from the plaques. The door stays shut, but the party can try again immediately. After three failed attempts, the plaques brighten and visibly group their dots into sets to make the lesson easier.
The archivist-mage Orena built this ward to protect a library of maps from careless hands, not to harm visitors. She taught young apprentices multiplication by arranging stones into equal rows, then made the same lesson part of the library door. Over the centuries, the ward's voice faded, but its gentle teaching lights still show how to make groups.
For an easier version, use only two plaques, or let the party count the dots without a time limit. For a harder version, add a fourth plaque with 4 × 3 or ask the party to explain how they grouped the dots before setting the dials.
Keep the focus on practicing multiplication rather than speed. Let the child use the dots, counters, fingers, or drawings. Praise a sound method as well as a correct answer. A failed attempt should be a chance to notice the grouped dots, not a punishment.
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