Ellipsoids On Small Pegs
A square wooden board with four pegs holding four ellipsoids of the same size. As an ellipsoid goes down over its peg the peg seems to disappear, and so does the hole through the middle of the ellipsoid: what was a thing with a gap in it becomes a whole shape again. Watching that happen four times is a serious piece of thinking for someone who has just worked out that objects survive being hidden. Wood and plywood, for ages 0 to 3.
“The greatest sign of success for a teacher is to be able to say, 'The children are now working as if I did not exist.'”
The Ellipsoids On Small Pegs brings three-dimensional geometry into the child's hands through carefully graded curved forms. Each wooden ellipsoid represents a mathematical progression in size, allowing children to perceive dimensional relationships through direct manipulation rather than abstract explanation.
- Discrimination of three-dimensional curved forms through tactile exploration
- Development of spatial reasoning by orienting ellipsoids correctly on peg
- Refinement of hand-eye coordination through precise placement movements
- Understanding of gradation and sequence in three-dimensional space
Read More
The sequential nesting of these smooth, curved pieces onto the central peg creates a concrete experience of spatial hierarchy, largest to smallest, that forms the foundation for later mathematical understanding. Unlike spheres or cubes, ellipsoids present a unique challenge: their elongated form requires precise orientation and careful observation to achieve proper placement on the peg. This precision-crafted wooden puzzle addresses the developmental need for refining spatial perception during the sensitive period for order, when children naturally seek to classify and arrange objects according to their attributes. The smooth wooden surfaces invite repeated handling, while the single peg design focuses attention on the mathematical relationship between each ellipsoid's dimensions.
How to present it
Follow the Montessori method of presentation for optimal child development.
Place the base with empty peg on a mat. Arrange ellipsoids randomly to the right, ensuring they're mixed rather than pre-ordered by size.
- 1
Invite the child to feel each ellipsoid, exploring the curved surfaces with both hands
Model slow, deliberate movements to encourage careful tactile exploration - 2
Select the largest ellipsoid and demonstrate finding its balance point before placing on peg
Show how to rotate the piece to find proper orientation - 3
Continue with remaining pieces, allowing child to discover the size sequence independently
If child struggles, place two ellipsoids side by side for comparison - 4
Once complete, lift each piece slowly to appreciate the tower formation
Count together as you remove each piece, reinforcing sequence - 5
Invite child to repeat independently, observing their growing precision
Step back to allow full concentration without intervention
Every Child Is a Little Creator
Heritage
Since 1929
Brands used by
schools worldwide
European brands
AMI
Endorsed
Related Materials
