Set Of Green Constructive Triangles
The first photo is the maker's own. The other shots are illustrative.
Inv. no. NIE-00490044
- Maker
- Nienhuis Montessori, since 1929
- Approval
- AMI
- Primary Material
- Solid wood
- Finish
- Green paint with black line details
- EAN
- 8719924003036
Final price incl. VAT. Delivery €5.90, €94.10 to go for free delivery.
Constructive Triangles (Nienhuis) €339.90Advice, warranty and returns are handled by us.
Why it costs €54.90
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 8719924003036 is on the box. It is the maker's number, not ours.
Set Of Green Constructive Triangles in a child's hands
The Set of Green Constructive Triangles puts children in direct contact with fundamental geometric relationships through real-world practice. Each precisely crafted wooden shape features strategic black guide lines that help children discover how different geometric forms can combine to create new shapes. This essential Sensorial material builds spatial reasoning and prepares the mathematical mind through concrete manipulation of plane geometry.
Geometric Reasoning
Children discover how shapes relate to each other by physically combining the pieces along the guide lines.
Visual Discrimination
The uniform green color isolates the concept of shape, allowing focus on geometric properties rather than color differences.
Mathematical Preparation
Hands-on exploration of equivalence and transformation prepares understanding of fractions and area.
Problem-Solving Skills
Children develop logical thinking as they experiment with different combinations to form new shapes.
How to present it
Place the green triangle box on a solid-colored mat. Remove triangles one at a time, placing them randomly on the mat. Sit to the child's right.
- 1Select two identical right-angled triangles and place them before you
- 2Slowly align the black lines on the hypotenuse of each triangle
- 3Slide triangles together until black lines meet perfectly, forming a square
- 4Trace the outline of the new square shape with your index finger
- 5Separate triangles and invite the child to reconstruct
3 tips for parents
- Create paper triangles at home with marked lines for additional practice with these concepts
- Point out triangular shapes in architecture and nature to reinforce geometric awareness
- Avoid correcting imperfect alignments; the child's repeated practice leads to self-correction
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
- Green triangle: with black guide line
- Green parallelogram: with diagonal black line
- Green square: with diagonal black line
- Green trapezoid: with black line marking
Size and material
| Packaging | 32 × 24 × 4 cm |
| Primary Material | Solid wood |
| Finish | Green paint with black line details |
| Recommended Age | 3-6 years |
Care
Wipe with slightly damp cloth, dry immediately
Frequently Asked Questions
What shapes are included in the Green Constructive Triangles set?
The Green Constructive Triangles set contains various triangular shapes including right-angled scalene triangles, obtuse-angled scalene triangles, and equilateral triangles. Each triangle features black guide lines that show how they can be combined to form other geometric shapes like squares, rectangles, parallelograms, and rhombuses.
How do the black guide lines help children learn?
The black guide lines on each triangle serve as visual guides showing where triangles can be joined together. These lines help children independently discover geometric relationships and understand how shapes can be decomposed and recomposed, developing their spatial reasoning without direct instruction.
What is the difference between the green triangles and other constructive triangle boxes?
The Green Constructive Triangles box specifically focuses on creating various quadrilaterals and exploring how triangles combine to form four-sided figures. Other boxes in the series (blue, yellow, red) introduce different geometric concepts like congruency, similarity, and equivalence through different triangle configurations.
What skills does this material develop in young children?
This material develops visual discrimination, spatial awareness, problem-solving abilities, and prepares the mathematical mind for geometry. Children also enhance fine motor skills, concentration, and learn geometric vocabulary while discovering relationships between shapes through hands-on exploration.
How should I present the Green Constructive Triangles to a child?
Begin by inviting the child to carry the box to a work mat. Show how to carefully remove triangles and trace their edges. Demonstrate matching the black lines to combine triangles into new shapes. Name the resulting shapes and encourage independent exploration. Always work from simple combinations to more complex arrangements.
Product safety
Manufacturer: Nienhuis Montessori, Anders Celsiusstraat 15, 7442 PB Nijverdal, Netherlands
Set Of Green Constructive Triangles