Classroom Noise Monitor🏰 Castle Builders 🏰
When the class is quiet, the builders work and the castle rises stone by stone. When it gets too loud, the builders stop and the scaffolding starts to shake!
Class goal: Finish the whole castle before the lesson ends!
Your browser will ask permission to use the microphone.
Sound stays on this computer. Nothing is recorded or sent anywhere.
How Castle Builders works
1. Lay the first stone
Choose a lesson length, press Start Building, and allow the microphone so the builders can settle into your room's rhythm.
2. Quiet raises the walls
Steady, calm work lets the builders raise towers and battlements stone by stone until the castle stands complete.
3. Noise shakes the scaffolding
Loud moments stop the builders and rattle the scaffolding, but built stone never falls. Tip: challenge the class to finish the castle by Friday.
Explore more themes
Quiet Jungle
FREEKeep your class quiet and watch a jungle grow full screen! Trees grow when the classroom is calm and wilt when it gets too loud.
Dino Valley
FREEKeep your class quiet and hatch baby dinosaurs from their eggs! Too much noise wakes the volcano and scares the dinos back into their shells.
Traffic Lights
FREEThe classic traffic light noise monitor, full screen! The light stays green and little cars cruise across town while the class is quiet. Too loud turns it red and jams the traffic.
Bouncy Balls
PROThe classic bouncy balls noise meter, flipped to reward calm! Colorful playground balls bounce while your class stays quiet. Too much noise stops the fun and deflates them.
Pirate Treasure
PROKeep your class quiet and fill a pirate chest with treasure! The ship sails toward the island while the room stays calm, and a storm brews when it gets too loud.
Coral Reef
PROKeep your class quiet and watch a coral reef bloom full screen! Corals grow and fish arrive when the classroom is calm, and the reef bleaches when it gets too loud.
Train Journey
PROKeep your class quiet and ride a steam train across the countryside, station by station! The signal turns red and the train stops when it gets too loud.
Space Launch
PROKeep your class quiet to build, fuel and launch rockets to every planet! The countdown holds when the classroom gets too loud.
Fairy Village
PROKeep your class quiet and light up a fairy village of mushroom houses! Glowing windows and fireflies fill the glade, until the wind blows the lights out.
Winter Aurora
PROKeep your class quiet to build a snowman and make the northern lights bloom! Too much noise kicks up a blizzard that blows the snow away.
Balloon Journey
PROKeep your class quiet and ride a hot air balloon from the fields to the stars! The balloon sinks when the classroom gets too loud.
Or head back to the classroom noise monitor homepage for the full overview and FAQ.
Castle Builders questions
Is Castle Builders free to use?
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Castle Builders is a Pro theme. Lifetime Pro is a one-time $20 payment that unlocks every theme, unlimited session time, and priority support. You can try the monitor for free first with the Quiet Jungle, Dino Valley, and Traffic Lights themes.
Can the class lose progress in Castle Builders?
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No. Castle Builders never takes away progress the class has earned. Noise only pauses the work, so every milestone stays put even on a rowdy day.
What age group is Castle Builders best for?
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Castle Builders fits elementary classes of all ages, and since the castle never crumbles it is a good choice for groups still practicing volume control.