Block Stacking

merged.cognitive.block_stacking

Thinkingmeasurable12mo–2.5y

Measured by 2 instruments· Cross-instrument confidence:

What this is

Child stacks at least two small objects like blocks on top of each other

Instrument	Approach	Age range	Mapping confidence	Ref
ASQ-3 24mo Ages & Stages Questionnaires, Third Edition — 24 Month Questionnaire	Parent screening report Subscale: Fine Motor	22mo–2.2y		fine_motor_q4
Bayley-4 Bayley Scales of Infant and Toddler Development, Fourth Edition	Clinician observation (developmental) Subscale: Fine Motor	1mo–3.5y		fine_motor.block_stacking

“Approach” describes how the instrument assesses this construct, not the specific items. We never reproduce proprietary test items.

Consensus window: 22mo–2.2y (all 2 instruments overlap).

Baseline: developmental_24mo_en_gbAge: 2yLocale: en-GBTone: mixed

“Does {child_name} build a tower with small blocks?”

Follow-up: “Roughly how tall can {he_she} make it before it topples — two or three, or closer to six or seven?”

Not yet

Holds blocks or bangs them together but doesn't stack

Emerging

Stacks 2-3 blocks before they fall

Developing

Stacks 4-6 blocks steadily

Secure

Builds a tower of around 7 blocks or more

If towers keep tumbling, sitting on the floor together with heavier wooden blocks makes a big difference.

The same canonical item shows up on the curriculum page with prerequisites, activities, and full developmental context.

ASQ-3 24mo
Squires, J., Bricker, D. (2009). The development of the Ages and Stages Questionnaires
doi:10.1111/j.1365-2214.2009.00996.x
Bayley-4
Aylward, G.P. (2020). New Bayley-4 Normative Data: Implications for Clinical Practice
doi:10.1097/DBP.0000000000000739