Beginning to organise and categorise objects, e.g. putting all the teddy bears together or teddies and cars in separate piles.
Observe whether the child: beginning to organise and categorise objects, e.g. putting all the teddy bears together or teddies and cars in separate piles.
What it looks like
Three ways this behaviour shows up as a child grows. Each level includes everyday moments to watch for.
Emerging
Just starting
The child occasionally groups a few similar objects together, often briefly or inconsistently. They may start a pile (e.g., two teddies) but then switch category, abandon the grouping, or mix items again.
What you might see
When given a mix of cars and teddies, moves items around but does not place similar items together, even after watching an adult sort.
Knocks over or mixes two piles without noticing that they were separated by type.
Puts two or three teddies together, then adds a car into the same group and continues without correcting.
Starts a pile of one type but quickly shifts to lining items up or throwing them into one container without sorting.
Expected
On track
The child purposefully makes simple categories using familiar object kinds (e.g., teddies together, cars together) especially during tidy-up or play. They can maintain two separate piles for a short period with support.
What you might see
During tidy-up, places cars into one area and teddies into another after an adult says "cars here, teddies there."
Adds newly found items to the correct pile (e.g., picks up a teddy and places it with the teddies) for several items in a row.
Exceeding
Going further
The child reliably organises objects into categories during play and routines, keeping piles separate and adding new items to the correct group. They can handle two categories consistently and may begin using a simple rule (same kind/looks like).
What you might see
Independently sorts a mixed box into two piles (e.g., animals vs vehicles) and keeps the piles separate while continuing to play.
Corrects a misplaced item by moving it to the matching group without being prompted.
After sorting by type, re-sorts by another feature (e.g., big vs small) when an adult suggests a new rule or when the child proposes one.
Explains their sorting choice using simple language/gestures (e.g., points and says "cars" while moving vehicles together).
Try this at home
Small everyday moments where you can notice this behaviour without setting up anything special.
Tidy-up routine: offer a small mixed set (teddies, cars, blocks) and say, "Can you put the same ones together?" Watch if they create piles and keep them separate.
Play: tip out a toy box and notice whether your child naturally gathers similar items (all animals together) before you suggest anything.
Mealtime: with safe items (spoons vs cups), ask your child to put all the same items in one place and a different kind in another.
Bath time: provide two types of bath toys (ducks and boats) and see if your child groups them, then ask, "Can you make two piles?"
Outdoor: collect leaves and small stones and ask your child to keep them in two different 'homes' (two bowls/areas) and observe whether they place each new item correctly.
Connected behaviours
Behaviours that scaffold, follow, or co-emerge with this one.
The framework source and supporting developmental research.
Framework source
Development Matters in the EYFS (2012), Mathematics: Numbers.
The construct is stated as an observable behaviour in the 8–20 months band describing early organisation and categorisation.
Developmental research
Mandler, J. M. (2004). The Foundations of Mind: Origins of Conceptual Thought. Oxford University Press.
Early categorisation and concept formation provide foundations for later symbolic and numerical thinking.
Five-level rubric (detailed)ShowHide
The full progression underlying the three levels above. Used by the platform’s reasoning agent when planning activities and observations.
Not Yet
The child handles objects without grouping them by type and shows no clear attempt to make piles or sets. If an adult starts sorting, the child may mix items back together without noticing category differences.
When given a mix of cars and teddies, moves items around but does not place similar items together, even after watching an adult sort.
Knocks over or mixes two piles without noticing that they were separated by type.
Emerging
The child occasionally groups a few similar objects together, often briefly or inconsistently. They may start a pile (e.g., two teddies) but then switch category, abandon the grouping, or mix items again.
Puts two or three teddies together, then adds a car into the same group and continues without correcting.
Starts a pile of one type but quickly shifts to lining items up or throwing them into one container without sorting.
Developing
The child purposefully makes simple categories using familiar object kinds (e.g., teddies together, cars together) especially during tidy-up or play. They can maintain two separate piles for a short period with support.
During tidy-up, places cars into one area and teddies into another after an adult says "cars here, teddies there."
Adds newly found items to the correct pile (e.g., picks up a teddy and places it with the teddies) for several items in a row.
Secure
The child reliably organises objects into categories during play and routines, keeping piles separate and adding new items to the correct group. They can handle two categories consistently and may begin using a simple rule (same kind/looks like).
Independently sorts a mixed box into two piles (e.g., animals vs vehicles) and keeps the piles separate while continuing to play.
Corrects a misplaced item by moving it to the matching group without being prompted.
Reflexive
The child flexibly categorises objects in different ways (e.g., by kind, size, or a self-chosen feature) and can re-sort when the rule changes. They may invite others to sort and show awareness of the category rule they are using.
After sorting by type, re-sorts by another feature (e.g., big vs small) when an adult suggests a new rule or when the child proposes one.
Explains their sorting choice using simple language/gestures (e.g., points and says "cars" while moving vehicles together).
