What is the Original Crystal Polydron CMY Class Set?

The Original Crystal Polydron CMY Class Set (Polydron code 10-CMYCRYSTAL-SPECIAL) is a colour mixing construction kit containing 96 squares in cyan, magenta and yellow. It is suitable for children aged 4 and over. Children snap the squares together to build cubes and cuboids, then rotate them to see the cyan, magenta and yellow combine into a spectrum of colours.

How does the CMY Class Set help children learn?

The set joins shape building with colour science. Children work out how three colours create many more as faces overlap. With 96 squares, a class can build many cubes and cuboids at once and compare the colour effects. Polydron provides two free downloadable guides for this set: the Original Crystal Polydron Model Guide and the Colour Mixing Guide. The set weighs 2.6 kg and measures 19 x 18 x 8.5 cm in its sturdy reusable carton.

For schools

• Links maths and science: pupils build cubes and cuboids while exploring how primary and secondary colours form.
• 96 squares support whole-class or group investigations at KS1 and KS2.
• Encourages prediction, observation and discussion as children rotate their models.
• Works in SEND provision and Quality First Teaching as a concrete, visual resource.
• Dishwasher safe at 70°C and stored in a reusable carton.

For parents and home use

• Turns a simple cube into a colour experiment children can repeat again and again.
• Builds fine motor skills as children join squares edge to edge.
• Invites open-ended play and questions about light and colour.
• Suitable from age 4, with free downloadable guides for ideas.

Supporting learners with SEND and learning differences

Hands-on construction helps many learners with SEND and learning differences understand ideas that are hard to explain in words. Building a cube from six squares makes the link between flat faces and a solid shape concrete. Watching colours change as a model turns gives an immediate, visual result that can hold attention and spark conversation. Joining squares also gives regular fine motor practice, and adults can set simple or open-ended tasks to suit each learner.

The Original Crystal Polydron CMY Class Set is available to order from The Dyslexia Shop, a UK specialist in resources for SEND and learning differences.

• Contents: 96 squares
• Total pieces: 96
• Colours: Cyan, magenta and yellow
• Material: BPA free and 100% recyclable
• Packaging: Sturdy reusable carton, recyclable
• Dimensions (L x W x H): 19 x 18 x 8.5 cm
• Weight: 2.6 kg
• Age: 4 years and over
• Guides: Original Crystal Polydron Model Guide and Colour Mixing Guide, free to download from Polydron
• Care: Dishwasher safe at 70°C
• Brand: Polydron (Original Polydron range)
• Polydron product code: 10-CMYCRYSTAL-SPECIAL

• Shape and colour together. Children build cubes and cuboids, then rotate them to see cyan, magenta and yellow combine.
• Class quantity. 96 squares let a whole class or several groups build and compare colour effects.
• Free guides. Polydron offers a Model Guide and Colour Mixing Guide to download for lesson ideas.
• Trusted UK supplier. Supplied by The Dyslexia Shop, a UK specialist in resources for SEND and learning differences.

What's in the Box

• 96 x squares in cyan, magenta and yellow

Care and Cleaning

Dishwasher safe at 70°C.

Safety and Age Suitability

Suitable for ages 4 years and over.

Delivery and Returns

Standard UK delivery applies. See our Delivery and Returns page for full details.

• What is the Original Crystal Polydron CMY Class Set?
  The Original Crystal Polydron CMY Class Set is a colour mixing construction kit of 96 squares from Polydron. The squares come in cyan, magenta and yellow. Children join them into cubes and cuboids, then rotate their models to see the three colours combine into a spectrum of new colours.
• What age is the CMY Class Set suitable for?
  The Crystal Polydron CMY Class Set is suitable for children aged 4 years and over. Younger children enjoy building a cube and watching the colours change, while older pupils can predict and record which colours appear. The same set can support simple exploration and more structured investigations as children grow.
• How can teachers use the CMY Class Set in lessons?
  Teachers can use the CMY Class Set to link shape work with colour science. Pupils build cubes and cuboids from squares, then investigate how cyan, magenta and yellow create primary and secondary colours. Polydron's free Colour Mixing Guide and Model Guide give ready-made activities to plan around.
• Is the CMY Class Set good for home learning?
  Yes, the CMY Class Set works well at home for curious children. Building a cube takes only six squares, so children see a result quickly, and turning it in the light keeps them exploring. Joining squares supports fine motor skills, and talking about the colours builds vocabulary and confidence.
• Is it suitable for children with SEND or learning differences?
  Yes, many children with SEND and learning differences respond well to hands-on, visual resources like this set. Building a cube from squares makes shape concrete, and the changing colours give an instant, visible reward. Adults can keep tasks simple or open-ended, and joining pieces offers useful fine motor practice.
• What comes in the CMY Class Set?
  The set contains 96 squares in cyan, magenta and yellow, packed in a sturdy reusable carton. Polydron lists the boxed set at 19 x 18 x 8.5 cm and 2.6 kg. The Original Crystal Polydron Model Guide and Colour Mixing Guide are free to download from Polydron.
• How do you clean the CMY Polydron squares?
  The CMY Class Set squares are dishwasher safe at 70°C. This makes it easy to clean the whole set after shared use in a classroom or group. Polydron also states that the pieces are BPA free and 100% recyclable, and the carton is reusable and recyclable.