18-to-24-month-old
Is My 18-to-24-Month-Old Developing Normally in Sensory?
At 18–24 months, most sensory behaviours — spinning, mouthing toys, loving or hating messy play, covering ears at loud sounds — are typical as your toddler learns how the world feels. Seek a developmental check if sensory responses are extreme and daily, disrupt eating, sleeping, dressing or play, or come with delays in talking, social connection or movement. These are reasons to assess early, not a diagnosis, because early support works best.
Sniffing toys, spinning, covering ears, loving messy play or hating it — toddlers explore the world through their senses, and noticing how yours responds is wonderful, attentive parenting.
In short
At 18–24 months, most sensory behaviours are completely typical — your toddler is learning how sights, sounds, textures and movement feel, and reactions can swing from delighted to overwhelmed in minutes. A developmental check is wise when sensory responses are extreme, persistent, get in the way of eating, sleeping, dressing or play, or travel alongside delays in talking, social connection or movement. None of this is a diagnosis — it simply means a clinician's gentle look is worthwhile now, because early support works beautifully at this age.What's typical at 18–24 months
Toddlers at this stage are busy sensory explorers. The following are usually completely normal:- Seeking input — spinning, jumping, crashing, climbing, squeezing into tight spaces, or loving deep hugs.
- Mouthing and touching — putting things in the mouth, smelling toys, running hands through sand, water or food.
- Some sensitivities — disliking loud noises, certain food textures, tags in clothes, or getting messy. Many toddlers cover their ears at a vacuum cleaner or fuss over a seam.
- Big swings — being thrilled one moment and overwhelmed the next, especially when tired, hungry or in a busy place.
These ebb and flow as your child's nervous system matures and language grows to help them tell you what they need.
Gentle flags worth a clinician's eye
Consider a developmental check if you notice:- Extreme, daily distress — meltdowns at everyday sounds, textures or lights that don't settle and disrupt routine.
- Getting in the way — sensory reactions that block eating a varied diet, sleeping, dressing, bathing or joining play.
- Very limited play — repeating one sensory action (spinning wheels, flicking lights) so much it crowds out other exploration.
- Travelling with other differences — few or no words, not responding to their name, little eye contact or shared smiling, not pointing, or loss of a skill once had.
The aim isn't alarm — it's turning small everyday questions into early opportunities.
The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online list. Our clinicians watch how your child responds to the world, what soothes and what overwhelms, and build playful support around your toddler's strengths. Our occupational therapy team can help with sensory regulation, and you can start any time on our [home page](/).Trusted sources
American Academy of Pediatrics (healthychildren.org) guidance on toddler sensory development and developmental monitoring; CDC developmental milestones and "Learn the Signs, Act Early" resources; ASHA guidance on early communication and play.Next step — Trust what you've noticed. Book a developmental assessment with a Pinnacle clinician for a calm, clear review of your toddler's sensory responses and milestones.
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
What to watch
Seek a check if sensory reactions cause extreme daily distress that disrupts routine, block eating a varied diet, sleeping, dressing or play, or show up as very limited repetitive sensory play. Especially if they travel with few words, little eye contact, no pointing, not responding to name, or loss of a skill.
Try this at home
Keep a short phone note of what your toddler seeks (spinning, squeezing, crashing) and what overwhelms them (sounds, textures, lights), and how easily they settle. Noticing triggers and recovery gives a clinician a clear, useful picture.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
Is it normal for my toddler to cover their ears at loud sounds?
Yes, this is very common at 18–24 months. Many toddlers dislike sudden or loud noises like vacuum cleaners or hand dryers. It usually eases as they mature. Consider a check only if the distress is extreme, happens at everyday sounds, and disrupts daily routine.
My toddler puts everything in their mouth and smells toys — should I worry?
Mouthing and smelling objects is a normal way toddlers explore their senses at this age. It typically fades over the second year. If it crowds out other play or comes with delays in talking or connecting with people, a gentle developmental check is wise.
When does sensory difficulty become something to assess?
Consider a developmental check when sensory responses are extreme and daily, get in the way of eating, sleeping, dressing or play, or travel alongside delays in communication, social connection or movement. This means assessment, not diagnosis — early support works best.