Guess the Colour Ball
Follow one ball as identical balls bounce around - then guess where it ended up
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Don't lose the red ball
Pick a shape and colour, then press Start.
One ball lights up. Watch it for 5 seconds, then keep your eyes on it while they all shuffle.
- Keep your eyes on the ball, not on the whole container.
- After a collision, check which ball bounced which way.
About this tool
Guess the Colour Ball is the "don't lose the red ball" challenge you may have seen in short videos, made playable. Up to 25 balls sit around the edge of a container and one of them lights up in your colour. You get five seconds to lock onto it, then every ball turns the same colour and they all start bouncing, colliding and changing direction. When the timer runs out, each ball glides to the nearest spot on the edge and you have to tap the one you were following. It sounds easy for the first few seconds - the trick is that two identical balls meeting and bouncing apart is exactly where most people lose track. Add more balls, pick a longer timer, a faster speed or an awkward container shape like a star or a heart to make it harder, and build a streak of correct guesses.
How to use this tool
- Choose the challengePick a container shape (circle, square, heart, star and more), the colour of the ball to follow, how many balls (10 to 25), a shuffle time between 10 seconds and 1 minute, and a speed.
- Press Start and find your ballOne of the balls lights up in your colour with a "follow the ball" arrow. A 5-second countdown in the middle gives you time to lock on.
- Follow it through the shuffleEvery ball turns the same colour and they bounce off each other and the walls. Keep your eyes on yours until the timer in the middle reaches zero.
- Tap the ball you followedThe balls settle into numbered spots around the edge. Tap the one you think it is - your ball then shows in its own colour and the rest switch back, so you see at once whether you were right.
Key features
- A quick, genuinely tricky test of visual attention and focus.
- Ten container shapes change how the balls move - corners and dips create sudden direction changes.
- Adjustable number of balls (10-25), shuffle time (10-60 seconds) and speed, from relaxed to very hard.
- Countdown and result sounds with a mute button, plus streak and best-streak tracking.
- Runs in your browser with no sign-up, download or ads between rounds.
Common uses
- A short focus warm-up before studying or work.
- Challenging friends to beat your streak on the same device.
- A classroom or party game on a big screen - use full screen mode.
- Practising "multiple object tracking", the skill of following one thing among many identical ones.
Tips for better results
- Follow the ball with your eyes, not your head - small smooth eye movements lose it less often.
- Watch closely when your ball meets another one: that is the moment the two can swap in your mind.
- Start with a circle and a short timer, then move to shapes with corners, which cause sharper bounces.
- If you lose it, keep watching the area where you last saw it - the settle step sends every ball to the nearest spot.
Mistakes to avoid
- Blinking or looking away right at the end - the last second is when balls tend to bunch together.
- Guessing by the ball's number from the start: the balls move to new spots, so the number usually changes.
- Jumping straight to 60 seconds on fast - build up from a short timer.
Available options
- Container shapes: circle, square, rounded square, heart, triangle, diamond, pentagon, hexagon, octagon and star.
- Ball colours: red, orange, yellow, green, blue, purple, pink and cyan.
- Shuffle time: 10 seconds to 1 minute, in 5-second steps.
- Number of balls: 10 to 25.
- Speed: calm, normal or fast.
Frequently asked questions
Press Start, remember the ball that lights up in your colour, and follow it while all the identical balls bounce around. When they stop, tap the one you followed.
Yes, it is the same idea as the popular "follow the red ball" videos - except here you actually play it and find out whether you tracked it correctly.
You choose: anything from 10 seconds to 1 minute, in 5-second steps. Longer shuffles mean more collisions and more chances to lose the ball.
Yes - anywhere from 10 to 25. More balls means more collisions and more look-alikes near yours, so it gets much harder.
Yes. There are ten shapes - circle, square, rounded square, heart, triangle, diamond, pentagon, hexagon, octagon and star. Shapes with corners and dips make the balls change direction more sharply.
Yes. Choose red, orange, yellow, green, blue, purple, pink or cyan. The other balls use a contrasting colour during the 5-second reveal, then all balls switch to your colour for the shuffle.
At the end every ball glides to the nearest free spot on the edge, so the ball you followed usually lands on a different number than where it started. Follow the ball, not the number.
Yes - a countdown tick, a chime when the balls settle, a celebration when you are right and a "faaah" when you are wrong. The balls themselves move silently. Use the speaker button to mute it.
Your current streak, best streak and total correct guesses are saved in this browser only. Nothing is uploaded and no account is needed.
Yes. The container scales to your screen and you tap a ball to guess. Full screen mode gives the biggest view.
People also search for
- follow the red ball game
- dont lose the red ball
- track the ball game online
- keep your eye on the ball game
- guess which ball game
- shell game online free
- visual attention test online
- multiple object tracking game