Hollow number shapes in the international version, an additional exercise for preparing a child to write numerals, from Maria Montessori's own idea as set out in The Discovery Of The Child. The international and US versions differ in how the numerals themselves are formed, and that matters more than it sounds: a child who traces a one with a serif and then meets a plain stroke at school has been taught a shape they now have to unlearn. Wood with non toxic paint, for ages 3 to 6.
“Free the child's potential, and you will transform him into the world.”
The Hollow Number Shapes serve as a concrete bridge between the child's sensorial exploration and abstract mathematical understanding.
Each wooden board's precisely routed channel creates a physical boundary that naturally constrains finger movement, allowing children to internalize correct numeral formation through repeated tactile experience. Unlike flat number cards, these hollow pathways engage the child's muscular intelligence, the hand educates the mind as fingers trace through each carved groove. The wooden boards transform number writing from an abstract copying exercise into a sensorial discovery where the child's finger follows the exact path needed for proper numeral construction. This material recognizes that mathematical abstraction emerges from concrete manipulation; by feeling the curves of an 8 or the angles of a 4 within these channels, children build a physical memory of number symbols before attempting to reproduce them with a pencil. The Hollow Number Shapes respect the child's need to touch and trace repeatedly, providing unlimited practice without the frustration of incorrect formation.


Follow the Montessori method of presentation for optimal child development.
Place the wooden boards on a mat in numerical order from 0-9. Have a small tray with sand or salt nearby for extension work. Ensure the child can see the starting point clearly marked on each board.
Demonstrate tracing the numeral 1, using your dominant index finger to follow the routed channel from start to finish
Invite the child to trace the same numeral, watching as their finger follows the carved pathway
Continue with numerals 2 and 3, always starting at the marked beginning point
After tracing in the boards, invite the child to 'write' the same numeral in sand or on paper

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Since 1929

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The engraved channels guide proper stroke order and direction, establishing correct writing patterns from the start.
Tracing through the grooves provides sensory feedback that reinforces number recognition through touch and movement.
Store boards vertically in a dedicated rack so children can select specific numerals for practice
Everything you need to know about this material.
Contact Our ExpertsThe Hollow Number Shapes are designed for children ages 3-6 years old, aligning with the sensitive period for mathematical concepts and fine motor development in early childhood.
Children trace the routed channels with their fingers or a wooden stylus, following the correct formation pattern for each numeral. This tactile experience helps develop proper number writing habits and muscle memory.
This material develops number recognition, proper numeral formation, fine motor control, hand-eye coordination, and pre-writing skills. It also provides sensorial preparation for mathematical concepts.
The set includes 10 wooden boards featuring numerals 0-9 with precisely routed channels. The International Version uses standard Western Arabic numerals commonly used in European and international contexts.
Unlike paper-based practice, these boards provide physical boundaries that guide correct formation. The tactile feedback helps children self-correct and builds muscle memory before transitioning to writing on paper.
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