OvoidIndividual Geometric Solid
The first photo is the maker's own. The other shots are illustrative.
Inv. no. NIE-018816
- Maker
- Nienhuis Montessori, since 1929
- Approval
- AMI
- Product size
- 10 × 10 cm
- Ovoid
- High-gloss plastic
- Base
- Clear acrylic
- EAN
- 8719924010065
Final price incl. VAT. Delivery €5.90, €118.10 to go for free delivery.
Advice, warranty and returns are handled by us.
Why it costs €30.90
Behind the price of the original are things you can check yourself.
AMI approval
The material is approved by the Association Montessori Internationale (AMI). Nienhuis has made Montessori materials since 1929.
A verifiable original
The EAN 8719924010065 is on the box. It is the maker's number, not ours.
Ovoid in a child's hands
The ovoid is an egg-shaped blue geometric solid used for the calculation of volume, with a plastic stand. Like the other blue solids of the set it is derived from a base of 10 × 10 cm, and its height is 10 cm. The stand holds the rounded solid in place on the table. Its dimensions can be compared with the other solids of the set, which start from the same base. The item weighs 200 g and is a single piece, not a set. Wipe it with a damp cloth and avoid abrasive cleaners. It is meant for children aged 6 to 12.
Geometric Understanding
Introduces the ovoid as a three-dimensional form distinct from spheres and ellipsoids, building advanced shape recognition.
Mathematical Language
Develops precise geometric vocabulary and descriptive language for curved surfaces and egg-shaped forms.
Spatial Reasoning
Enhances ability to visualize and understand three-dimensional shapes through tactile exploration and observation.
Scientific Connection
Links geometric forms to natural shapes found in biology, preparing for interdisciplinary learning.
How to present it
Place the ovoid on its transparent base at the child's work table. Have paper and colored pencils ready for recording observations.
- 1Invite the child to remove the ovoid from its base and explore its surface with both hands, noting where it curves most and least
- 2Place the ovoid back on its base and rotate it slowly, observing how its silhouette changes from different viewing angles
- 3Compare the ovoid to a sphere by attempting to roll both - note how the ovoid follows an curved path while a sphere rolls straight
- 4Trace around the ovoid's widest point and narrowest point on paper, creating cross-sectional drawings
3 tips for parents
- Look for ovoid shapes during grocery shopping - many fruits and vegetables demonstrate this form
- Support homework by helping find ovoid objects at home for measurement and comparison
- Discuss why nature often creates ovoid rather than perfectly spherical forms
If you are not sure it suits your child, we answer in person.
Norbert Kovalčín, founder of Faborino · write to him
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What's in the Box
- Blue Ovoid: Glossy egg-shaped geometric solid
- Clear Base: Cylindrical acrylic stand
Size and material
| Product size | 10 × 10 cm |
| Packaging | 12 × 10 × 9 cm |
| Ovoid | High-gloss plastic |
| Base | Clear acrylic |
| Recommended Age | 6-12 years |
Care
Wipe with damp cloth, avoid abrasives
Frequently Asked Questions
What mathematical concepts does the ovoid teach?
The ovoid introduces curved surfaces, rotational symmetry, cross-sections, and the relationship between 2D circles and 3D forms. Children explore how an ellipse rotated around its axis creates an egg-shaped solid, building understanding of three-dimensional geometry.
How is this different from a sphere or ellipsoid?
Unlike a sphere with uniform curvature, the ovoid has varying curvature - more pointed at one end and rounded at the other. This egg shape helps children understand that not all curved 3D objects are spheres and develops their ability to distinguish between geometric forms.
What activities can children do with the ovoid?
Children can trace cross-sections, compare it with other geometric solids, explore how it rolls differently than a sphere, study light reflections on its surface, and use it as a model for drawing and understanding natural forms like eggs.
Why does it have a transparent base?
The transparent cylindrical base serves multiple purposes: it keeps the ovoid stable for observation, allows children to see the contact point, demonstrates how 3D objects rest on surfaces, and enables viewing from below to understand the complete form.
How does this connect to other Montessori geometry materials?
The ovoid extends work with geometric solids, complementing spheres, cones, and cylinders. It bridges to advanced concepts like conic sections and prepares for later study of calculus concepts involving curves and rates of change in upper elementary.
Product safety
Manufacturer: Nienhuis Montessori, Anders Celsiusstraat 15, 7442 PB Nijverdal, Netherlands
Ovoid