Toddler Lying or Making Up Stories
Medically reviewed by Dr. Emily Torres, PhD, CCC-SLP · Pediatric Speech-Language Pathologist
Content reviewed against published AAP, CDC, Zero to Three guidelines
Last reviewed:
Behavioral development varies greatly from child to child. If you have noticed toddler lying or making up stories, here is what you need to know.
The short answer
Lying in toddlers and preschoolers is actually a sign of healthy cognitive development. The ability to lie requires understanding that other people have different thoughts and knowledge than you do - a skill called "theory of mind" that emerges around ages 2-4. Most toddler "lies" are actually wishful thinking, vivid imagination, attempts to avoid trouble, or testing boundaries. This is normal and does not mean your child will become dishonest.
Key takeaways
- Lying in toddlers and preschoolers is actually a sign of healthy cognitive development. The ability to lie requires understanding that other people have different thoughts and knowledge than you do - a skill called "theory of mind" that emerges around ages 2-4. Most toddler "lies" are actually wishful thinking, vivid imagination, attempts to avoid trouble, or testing boundaries. This is normal and does not mean your child will become dishonest.
- Usually normal when: Your toddler tells fantastical stories about things that clearly did not happen - this is imagination, not lying
- Call your doctor if: Your child is telling stories about events that concern you and you are not sure whether they are real or imagined - always take reports of harm seriously and consult your pediatrician
- Varies by age — see the age-by-age breakdown below
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What Parents Should Know
According to AAP, CDC, Zero to Three guidelines, lying in toddlers and preschoolers is actually a sign of healthy cognitive development. The ability to lie requires understanding that other people have different thoughts and knowledge than you do - a skill called "theory of mind" that emerges around ages 2-4. Most toddler "lies" are actually wishful thinking, vivid imagination, attempts to avoid trouble, or testing boundaries. This is normal and does not mean your child will become dishonest. At 18 months - 2.5 years, at this age, children do not truly understand the concept of lying. When a toddler says "I didn't do it" while holding the evidence, they may be expressing what they wish had happened or simply parroting a phrase they have heard. Their understanding of truth and fiction is still developing. Reacting calmly and focusing on the behavior rather than the lie is most effective: "The milk spilled. Let's clean it up together.". It is generally considered normal when your toddler tells fantastical stories about things that clearly did not happen - this is imagination, not lying. However, you should contact your pediatrician promptly if your child is telling stories about events that concern you and you are not sure whether they are real or imagined - always take reports of harm seriously and consult your pediatrician.
Normal vs. Concerning
By Age
What to expect by age
18 months - 2.5 years
At this age, children do not truly understand the concept of lying. When a toddler says "I didn't do it" while holding the evidence, they may be expressing what they wish had happened or simply parroting a phrase they have heard. Their understanding of truth and fiction is still developing. Reacting calmly and focusing on the behavior rather than the lie is most effective: "The milk spilled. Let's clean it up together."
2.5-3.5 years
Children begin to understand that they can say things that are not true, but they are still experimenting with this concept. Tall tales and imaginary scenarios are common and healthy. A child who tells you they flew to the moon is using their imagination, not being deceptive. When a child lies to avoid consequences, keep your response low-key: focus on the problem, not the lie. "I can see the crayon marks on the wall. Crayons are for paper."
3.5-4.5 years
This is when more deliberate lying may emerge. Your child now understands the difference between truth and fiction and may try to avoid trouble or get what they want through lying. This is the time to begin gently teaching the value of honesty. Make it safe to tell the truth by not overreacting: "Thank you for telling me the truth. I know that was hard." Avoid setting traps ("Did you eat the cookie?" when you already know they did).
4-5 years
Lying becomes more sophisticated as theory of mind develops fully. Children may lie to protect others' feelings, to make themselves look good, or to avoid punishment. This is a normal part of social development. Continue to emphasize honesty by modeling it, praising truthfulness, and keeping consequences proportionate. Occasional lying at this age is not a character flaw.
What to Tell Your Pediatrician
- Describe when you first noticed toddler lying or making up stories and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child lies constantly about many things, even when there is no reason to avoid trouble, and the behavior seems compulsive.
- Mention if lying is accompanied by other concerning behaviors like persistent aggression, cruelty to animals, or significant difficulty at school or daycare.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your toddler tells fantastical stories about things that clearly did not happen - this is imagination, not lying
- Your child denies doing something obvious to avoid getting in trouble - this is the most common type of early "lie"
- Lying is occasional rather than constant and responds to gentle correction over time
- Your child is between 2 and 5 years old and experimenting with the concept of truth
- Your child lies constantly about many things, even when there is no reason to avoid trouble, and the behavior seems compulsive
- Lying is accompanied by other concerning behaviors like persistent aggression, cruelty to animals, or significant difficulty at school or daycare
- Your child seems unable to distinguish between reality and fantasy in a way that seems unusual for their age
- Your child is telling stories about events that concern you and you are not sure whether they are real or imagined - always take reports of harm seriously and consult your pediatrician
- Lying is accompanied by extreme behavioral changes, withdrawal, or signs of significant emotional distress
What You Can Do at Home
- Keep track of when you notice toddler lying or making up stories — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your toddler tells fantastical stories about things that clearly did not happen - this is imagination, not lying — this is generally within the range of normal.
- At 18 months - 2.5 years, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Respond consistently and calmly to your baby's behavior. Maintain predictable daily routines.
- While monitoring at home, seek immediate care if your child is telling stories about events that concern you and you are not sure whether they are real or imagined - always take reports of harm seriously and consult your pediatrician.
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is toddler lying or making up stories normal?
When should I call the doctor about toddler lying or making up stories?
When is toddler lying or making up stories normal?
What causes toddler lying or making up stories?
What should I mention to my pediatrician about toddler lying or making up stories?
Is toddler lying or making up stories normal at 18 months - 2.5 years?
Is toddler lying or making up stories normal at 2.5-3.5 years?
Should I go to the ER for toddler lying or making up stories?
Does toddler lying or making up stories go away on its own?
References
- [1]American Academy of Pediatrics. Lying and Children. HealthyChildren.org. AAP
- [2]Centers for Disease Control and Prevention. Positive Parenting Tips: Preschoolers (3-5 years). CDC
- [3]Zero to Three. How to Respond to Your Toddler's Tall Tales. Zero to Three
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Toddler Lying or Making Up Stories.
Things to mention
- Describe when you first noticed toddler lying or making up stories and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your child lies constantly about many things, even when there is no reason to avoid trouble, and the behavior seems compulsive.
- Mention if lying is accompanied by other concerning behaviors like persistent aggression, cruelty to animals, or significant difficulty at school or daycare.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your child lies constantly about many things, even when there is no reason to avoid trouble, and the behavior seems compulsive
- Lying is accompanied by other concerning behaviors like persistent aggression, cruelty to animals, or significant difficulty at school or daycare
- Your child seems unable to distinguish between reality and fantasy in a way that seems unusual for their age
Urgent signs to report immediately
- Your child is telling stories about events that concern you and you are not sure whether they are real or imagined - always take reports of harm seriously and consult your pediatrician
- Lying is accompanied by extreme behavioral changes, withdrawal, or signs of significant emotional distress
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of toddler lying or making up stories are normal. Talk to your pediatrician if your child is telling stories about events that concern you and you are not sure whether they are real or imagined - always take reports of harm seriously and consult your pediatrician.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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