Introduction
Children are naturally drawn to color and light. This simple rainbow STEM activity uses translucent Lucite Cubes to introduce early science concepts like refraction, color mixing, and light exploration through hands-on play.
Perfect for toddlers and preschoolers, this activity turns everyday sunlight into an engaging sensory and STEM learning experience.
Age Range
3–7 years (younger children can explore freely with supervision)
Skills Developed
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Early physics concepts
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Scientific observation
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Color recognition and mixing
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Sensory exploration
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Creative problem-solving
Materials Needed
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Lucite Cubes (Like those included in the Riley Blocks, Barca Blocks, James Blocks, Noa Blocks, Ines Blocks, and Millie Blocks)
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Sunlight from a window or a flashlight
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A white surface (paper, wall, or floor)
Optional:
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Mirror
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Clear container of water
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White poster board for stronger reflections
Step-by-Step Instructions
Step 1: Set Up Your Light Source
Place your Lucite Cube in direct sunlight near a window, or shine a flashlight through the cube in a dim room.
Step 2: Observe the Refraction
Encourage your child to rotate and tilt the cube slowly. Watch how the light bends and creates rainbow reflections.
Ask:
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“What happens when we turn it?”
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“Why do the colors move?”
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“What colors do you see?”
Step 3: Experiment with Color Mixing
Layer two or more colored cubes together and predict what new color will appear.
Try:
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Red + Blue
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Yellow + Blue
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Red + Yellow
Let children test their predictions and compare results.
STEM Learning Concepts
Refraction
Light bends when it passes through transparent materials. Lucite Cubes act like small prisms, separating light into visible colors.
Color Theory
Layering translucent cubes demonstrates how light waves combine to create new colors.
Scientific Inquiry
Children observe, test, adjust, and draw conclusions — the foundation of early STEM learning.
Extend the Activity
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Use a mirror, like our mirror tray to reflect light onto different surfaces
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Create a “rainbow hunt” and photograph patterns
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Trace rainbow reflections onto paper
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Try the activity outdoors at different times of day
Why Light Play Matters
Light exploration encourages curiosity and observation. Sensory-based STEM activities help children build foundational scientific understanding in a playful, memorable way.
Open-ended toys like Lucite Cubes allow children to experiment freely, strengthening creativity while introducing real scientific concepts.
Shop the Lucite Collection
Lucite Cubes are available within our Riley Blocks, Barca Blocks, James Blocks, Noa Blocks, Ines Blocks, and Millie Blocks sets. Each set is designed for open-ended building and hands-on STEM exploration.
