RoomTone vs Bouncy Balls.

Both are free browser tools that turn a classroom microphone into a picture. They teach different lessons about what should happen when the room gets loud.

Two honest tools, two different payoffs

Bouncy Balls is a well-known free website. Teachers open it, allow the microphone, and project balls, bubbles, emoji, or eyeballs that bounce higher as the room gets louder. Sensitivity is adjustable. Optional alerts include a beep or a shush. There is no account to create. For a fast visual of “the room just spiked,” it is easy to understand.

RoomTone is also a free website with no account. It uses the microphone only after you press Start and refuses to record or upload audio. The picture is different: Sleepy Cat reacts live and recovers gradually, while three Goal Challenges turn quiet and working sound into forward progress. Sustained loudness pauses those goals, and progress already earned is not taken away. The payoff is a calm reaction or a completed goal, not a more chaotic animation.

Why the payoff matters

Common Sense Education's review of Bouncy Balls noted a real classroom risk: students may make noise on purpose to see the chaos. Teacher blogs say the same thing. If the entertaining state is the loud state, some rooms will perform. That does not make Bouncy Balls a bad tool. It makes it a better fit for a class that already treats the display as a reminder, or for a short demonstration of cause and effect.

RoomTone was designed against that failure mode. The useful state on screen, whether it is a sleeping cat, a plane going home, a garden growing, or a sky clearing, happens while the room is in range. Loudness wakes Miso or holds a Goal Challenge still. If your students chase stimulation, this mapping is the point of switching.

Alarms

Bouncy Balls can play a shush or beep when the threshold is crossed. That is useful when students are not facing the board. It is costly in a test, a read-aloud, or a sensory-sensitive group. RoomTone's chime is local, rate-limited, and off until you choose it. We recommend visual-only first in both tools. See the traffic-light guide.

When we would still open Bouncy Balls

• A two-minute demonstration of “sound has an effect on the board.”
• A class that already self-regulates and just wants a silly meter.
• A teacher who needs zero explanation and already knows the sensitivity slider.

When RoomTone is the better fit

• You want a shared goal, not only a spike detector.
• You need silent / partner / group targets without reinventing them each period.
• You want the fun state to be the calm state.
• You want a privacy page that states, in public, that audio is not recorded or uploaded.

Privacy, briefly

Neither tool needs a student roster. You should still treat any microphone page with care: press Start only when you mean to, pause when you leave, and do not aim the device at one child. RoomTone's privacy policy documents local processing, analytics cookies, and advertising cookies. If a district requires a written tool review, that page is the packet.

A practical way to trial both

If you already have a bookmark to Bouncy Balls, keep it for a two-minute demonstration of cause and effect. Then run the actual work block on RoomTone with a one-minute goal. Ask the class which picture helped them work. You are not taking a vote on entertainment. You are asking which cue they could use without performing. Their answer, plus whether you had to shush, is the trial.

Some rooms will prefer the bouncing balls. That is allowed. A class that self-regulates and likes the joke may not need a progress garden. RoomTone is for rooms where the joke became the noise, or where you want named activity targets and a goal that does not reverse. Switching is cheap because both tools are free websites. You are not locked into a license key.

Do not run both at once. Two microphones and two animations will not make a quieter room. Pick one display, teach it, and give it a week before you judge. The first-week notes apply whichever picture you choose.

If your students already know Bouncy Balls as a Friday joke, do not try to overwrite it on a Friday. Introduce RoomTone on a work block they already take seriously. New pictures stick to the job you pair them with. Pair a Goal Challenge with writing or partner talk, not with the period where the class expects to make balls fly.