Quick answer: most children start telling small lies between about two and four, and it is a normal sign of brain development rather than a sign of bad character. Harsh reactions tend to produce better liars, not more honest children. Stay calm, avoid setting traps, make the truth safe to tell, and praise honesty on its own.
The biscuit tin is open. There are crumbs on the sofa and crumbs on your child. You ask who ate the biscuits, and your four-year-old looks you in the eye and says the cat did it.
You do not have a cat.
It is tempting to feel alarmed at this point. It helps to know that your child has just shown you something quite impressive about how their mind is growing.
Why lying is a milestone
To tell a lie, a child needs several skills that are still very new.
Understanding that other people have different thoughts. Very young children assume that if they know something, everyone knows it. Realising that you did not see what happened, and could believe something false, is a big step in understanding other minds.
Holding two versions of events at once. What really happened, and the story they want you to believe.
Controlling their face and voice, at least a little, while they say it.
Put together, those skills are the same ones children use for empathy, pretend play and seeing things from another person's point of view. So the first fibs are, a little awkwardly, good news.
The main types of fib
Avoiding trouble. By far the most common. "I didn't do it" when they clearly did.
Wishful thinking. "I already brushed my teeth" often means "I would like very much to have already brushed my teeth."
Fantasy. "We have a dragon at my school." Preschoolers blur imagination and reality, especially when a story is more exciting than the truth. This is play, not deceit.
Boasting. "I can swim faster than a shark." Usually a wish to impress.
Kindness. "I love the present." Children learn early that adults tell small social lies, and they copy.
Each deserves a slightly different response, and only the first is really worth addressing.
What tends to backfire
Setting traps. "Did you draw on the wall?" when you watched them do it invites a lie. The child is being offered a choice between honesty and trouble, and they take the obvious option.
Big punishments for lying. Research on young children suggests that punitive environments are associated with more lying, and more skilful lying, not less. If the truth leads to something frightening, children learn to hide it better.
Calling them a liar. Children tend to live up to their labels. "You are a liar" becomes part of how they see themselves.
Long lectures. Four-year-olds lose the thread after about a sentence.
What builds honesty
State what you know. Instead of "Did you eat the biscuits?", try "I see you ate the biscuits." There is no lie to tell.
Make the truth safe. "You will not be in trouble for telling me. I just need to know what happened." Then keep that promise, and deal with the practical problem calmly.
Thank them for honesty separately. "Thank you for telling me the truth. That was brave. Now let's clean the wall together." The honesty earns warmth; the mess still gets fixed.
Give a second chance. "That sounds like a story. Do you want to try again?" Many children take it, and it teaches that correcting a fib is possible.
Model it. Children notice when the adult on the phone says "we are nearly there" from home, or when they are asked to say they are younger to get a cheaper ticket. The small adult lies are the ones children learn from.
Tell stories that reward honesty. One well-known study found that stories showing a character praised for telling the truth encouraged honesty more than stories where lying was punished.
Enjoy the fantasy. "A dragon at school, wow. What colour is it?" You can play along while occasionally mentioning, lightly, that it is a pretend story.
What we see at school
Fibs are part of ordinary preschool life, especially around who had the red bike first or whose tower fell over. Our teachers respond the same way we suggest at home: describe what they saw, keep things calm, and focus on repairing the problem rather than extracting a confession.
We also spend a great deal of time on the skills underneath honesty: naming feelings, taking turns, saying sorry and making things right. A child who knows how to fix a mistake has much less reason to hide one.
When to seek advice
Talk to your doctor or a child development professional if lying is very frequent and continues well into the primary years, if it comes with other ongoing behaviour concerns such as aggression or stealing, or if your child seems unable to tell pretend from real in a way that worries you.
Also pay attention when a lie might be covering something upsetting, such as someone hurting them or a secret they have been told to keep. Make sure they know they can always tell you anything, and that you will not be angry.
The long view
The child who blamed the imaginary cat is not heading for a life of crime. They are learning how minds work, and they are learning it with you watching.
Every calm response teaches them that telling the truth is safer than the alternative. Over years, that is what honesty is built from.
Shaws Preschool has helped children learn to own their mistakes and make things right across the East Coast and Serangoon since 1989. Come and see how our teachers handle the everyday wobbles: book a tour.
