My Toddler Can't Stack Blocks
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published AAP, CDC, NIH guidelines
Last reviewed:
Your baby's physical development is unique, and concerns about my toddler can't stack blocks, here is what you need to know.
The short answer
Stacking 2 blocks typically develops around 13-15 months. By 18 months, most toddlers can stack 2-4 blocks, and by 2 years, 6 or more. Many toddlers prefer knocking towers down before learning to build them, which is normal play behavior. If your child cannot stack 2 blocks by 18 months, mention it at your next visit.
Key takeaways
- Stacking 2 blocks typically develops around 13-15 months. By 18 months, most toddlers can stack 2-4 blocks, and by 2 years, 6 or more. Many toddlers prefer knocking towers down before learning to build them, which is normal play behavior. If your child cannot stack 2 blocks by 18 months, mention it at your next visit.
- Usually normal when: Your toddler is under 15 months and is still learning to stack.
- Call your doctor if: Your child has lost fine motor skills they had.
- Varies by age — see the age-by-age breakdown below
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What Parents Should Know
According to AAP, CDC, NIH guidelines, stacking 2 blocks typically develops around 13-15 months. By 18 months, most toddlers can stack 2-4 blocks, and by 2 years, 6 or more. Many toddlers prefer knocking towers down before learning to build them, which is normal play behavior. If your child cannot stack 2 blocks by 18 months, mention it at your next visit. At 10-13 months, most babies at this age prefer knocking down towers you build rather than building their own. They may place one block on top of another briefly before it falls. This is the precursor to stacking and is completely normal. It is generally considered normal when your toddler is under 15 months and is still learning to stack. However, you should contact your pediatrician promptly if your child has lost fine motor skills they had.
Normal vs. Concerning
By Age
What to expect by age
10-13 months
Most babies at this age prefer knocking down towers you build rather than building their own. They may place one block on top of another briefly before it falls. This is the precursor to stacking and is completely normal.
13-18 months
Most toddlers can stack 2-3 blocks during this period. Initial stacking is wobbly and may require several attempts. If your toddler prefers to knock towers down, encourage stacking by making it fun and celebrating their attempts.
18-24 months
Your toddler should be able to stack at least 3-4 blocks. If they cannot stack 2 blocks by 18 months, mention it to your pediatrician. Difficulty stacking can relate to fine motor control, hand-eye coordination, or attention.
2-3 years
Most children can build towers of 6-8 blocks by age 2. If your child cannot stack blocks at all by this age, evaluation of fine motor skills and coordination is recommended.
What to Tell Your Pediatrician
- Describe when you first noticed my toddler can't stack blocks 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 is over 18 months and cannot stack 2 blocks.
- Mention if your child has difficulty placing objects precisely.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- 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 is under 15 months and is still learning to stack.
- Your toddler can stack but prefers to knock towers down.
- Your toddler stacks 2 blocks but the tower is wobbly.
- Your toddler recently started stacking and is improving.
- Your child is over 18 months and cannot stack 2 blocks.
- Your child has difficulty placing objects precisely.
- Your child has other fine motor delays alongside stacking difficulty.
- Your child has lost fine motor skills they had.
- Your child's hand coordination is declining.
What You Can Do at Home
- Keep track of when you notice my toddler can't stack blocks — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your toddler is under 15 months and is still learning to stack — this is generally within the range of normal.
- At 10-13 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Provide plenty of supervised floor time and tummy time to support your baby's physical development.
- While monitoring at home, seek immediate care if your child has lost fine motor skills they had.
Related Conditions
Baby Not Stacking Blocks
Block stacking is a fine motor milestone that typically begins around 12 to 15 months, when most toddlers can stack 2 blocks. By 18 months, many children can stack 3 to 4 blocks, and by 2 years, a tower of 6 or more. Before 12 months, babies are more interested in grasping, mouthing, and banging blocks rather than stacking them, and that is perfectly appropriate.
My Baby Has Overall Fine Motor Delays
Fine motor skills develop gradually from grasping rattles to using a pincer grip to scribbling and stacking. If your child seems behind in multiple fine motor areas, an occupational therapy evaluation can identify specific areas to work on. Many fine motor delays respond very well to targeted therapy and practice.
Poor Hand-Eye Coordination
Hand-eye coordination - the ability to use visual information to guide hand movements - develops gradually throughout infancy and toddlerhood. Babies begin by swiping at objects they see around 3 to 4 months and progressively become more accurate. It is normal for young children to be "clumsy" with their hands, and precision improves significantly with practice and brain maturation.
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 my toddler can't stack blocks normal?
When should I call the doctor about my toddler can't stack blocks?
When is my toddler can't stack blocks normal?
What causes my toddler can't stack blocks?
What should I mention to my pediatrician about my toddler can't stack blocks?
Is my toddler can't stack blocks normal at 10-13 months?
Is my toddler can't stack blocks normal at 13-18 months?
Should I go to the ER for my toddler can't stack blocks?
Does my toddler can't stack blocks go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Toddler Can't Stack Blocks.
Things to mention
- Describe when you first noticed my toddler can't stack blocks 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 is over 18 months and cannot stack 2 blocks.
- Mention if your child has difficulty placing objects precisely.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your child is over 18 months and cannot stack 2 blocks.
- Your child has difficulty placing objects precisely.
- Your child has other fine motor delays alongside stacking difficulty.
Urgent signs to report immediately
- Your child has lost fine motor skills they had.
- Your child's hand coordination is declining.
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 my toddler can't stack blocks are normal. Talk to your pediatrician if your child has lost fine motor skills they had.
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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Related Physical Concerns
Baby Not Stacking Blocks
Block stacking is a fine motor milestone that typically begins around 12 to 15 months, when most toddlers can stack 2 blocks. By 18 months, many children can stack 3 to 4 blocks, and by 2 years, a tower of 6 or more. Before 12 months, babies are more interested in grasping, mouthing, and banging blocks rather than stacking them, and that is perfectly appropriate.
My Baby Has Overall Fine Motor Delays
Fine motor skills develop gradually from grasping rattles to using a pincer grip to scribbling and stacking. If your child seems behind in multiple fine motor areas, an occupational therapy evaluation can identify specific areas to work on. Many fine motor delays respond very well to targeted therapy and practice.
Poor Hand-Eye Coordination
Hand-eye coordination - the ability to use visual information to guide hand movements - develops gradually throughout infancy and toddlerhood. Babies begin by swiping at objects they see around 3 to 4 months and progressively become more accurate. It is normal for young children to be "clumsy" with their hands, and precision improves significantly with practice and brain maturation.
Should I Use Adjusted Age for My Preemie's Milestones?
Yes — for premature babies, developmental milestones should be assessed using adjusted (corrected) age, not chronological age, until at least 2 years of age. Adjusted age is calculated by subtracting the number of weeks your baby was born early from their actual age. For example, a 6-month-old born 2 months early would have an adjusted age of 4 months, and should be assessed against 4-month milestones. Most pediatricians use adjusted age for developmental assessment through age 2-3, and for growth charts through age 2.
Baby-Proofing a Small Apartment
Baby-proofing a small apartment is absolutely possible and focuses on the same key safety principles as any home: securing furniture to walls, covering outlets, locking cabinets with hazardous materials, and ensuring safe sleep spaces. Small spaces actually have an advantage - there is less area to monitor. Focus on eliminating the most dangerous hazards first: falls, poisoning, choking, and burns.
My Baby Seems to Use One Side More Than the Other
Babies should use both sides of their body fairly equally during the first 18 months of life. While slight preferences can be normal, a consistent pattern of favoring one side - using one arm much more than the other, crawling with one leg dragging, or turning the head predominantly one way - should always be discussed with your pediatrician. Early identification of asymmetry leads to the best outcomes.