Processing speed game · Grades 2–13
Colour Clash: Free Stroop Test Game for Kids
Colour Clash is a free online game based on the famous Stroop test. A word says one thing and the picture shows another: tap what you actually see, not what the word says. It sounds easy until your brain starts reading the word first.
Part of our 24 brain games for kids, free with an account.
What Colour Clash trains
Colour Clash practises inhibitory control: stopping a quick, automatic response (like reading a word) and choosing the right one instead. This is a core part of attention and self-control, and it supports focus, following instructions and careful work in class. Game types include colours, shapes and arrows, plus Count and Position for confident players.
What the research says: Colour Clash is based on the Stroop effect, first described in 1935, in which naming the ink colour of a clashing word takes longer (Stroop, 1935); researchers have used it for decades to measure selective attention and self-control (MacLeod, 1991).
Who Colour Clash is for
Colour Clash suits Grades 2–13, roughly ages 7 to 18. Starter uses three choices. Explorer adds red “wait” turns where the player must not tap. Challenger adds gold turns that switch the rule, and Expert uses five choices plus teal “look back” turns that also stretch working memory.
How to play Colour Clash
- Choose a game type: colours, shapes, arrows, Count or Position.
- Read the rule at the top, for example “Tap the INK COLOUR”.
- Look past the word and tap the answer that matches what you see.
- Watch for special turns: red means wait, gold means the rule switches.
- Check your results to see your accuracy and speed.
Tips for parents and teachers
Keep sessions short, around 5 to 10 minutes or two or three rounds. Praise steady, careful answers over speed, and leave Race mode off until accuracy is high. Clashing turns are usually a little slower than matching ones. That gap is normal: it is the brain holding back the word, and it tends to shrink with practice, so celebrate it getting smaller.
FAQs
What is the Stroop test?
The Stroop test, first described by J. R. Stroop in 1935, shows colour words printed in a different ink colour and asks you to name the ink. Reading is so automatic that the word gets in the way, which makes it a classic measure of attention and self-control.
What age is Colour Clash for?
Grades 2–13, roughly ages 7 to 18. Starter has three choices for younger children; Expert adds rule switches and “look back” turns that challenge teenagers and adults.
Why are the clashing turns slower?
Because the brain has to stop itself going with the word. That small delay is normal, and it usually shrinks with practice.
Can Colour Clash be used in the classroom?
Yes. A round takes a few minutes, so it works as a warm-up or brain break, and it is a good way to talk about self-control and reading the whole question before answering.