Turn invisible forces into visible wonder with the Magnetic Field Demonstrator – 2D Acrylic. This hands-on science resource lets young learners see the otherwise invisible magnetic field patterns that surround magnets. The clear acrylic block is filled with a light fluid and fine filings that respond to magnets, revealing beautiful arch-like lines and patterns that demonstrate the strength and direction of magnetic forces. Just place a bar or horseshoe magnet on the surface and watch the filings align into curves and loops right before your eyes — a truly magical moment that makes abstract science tangible and exciting.
This magnetic field viewer is perfect for engaging exploration in science centres, group demonstrations or small-group activities. It supports thoughtful observation and discussion as learners make predictions, test different magnets and discover how magnetic forces work, all with minimal mess and easy setup.
Educational benefits:
Makes magnetic force lines visible, supporting understanding of abstract physical science concepts
Encourages careful observation and comparison as different magnets are tested
Develops prediction and reasoning skills through hypothesis and experimental testing
Supports scientific vocabulary as learners describe field patterns and phenomena
Classroom & play activity ideas:
Place different types of magnets (bar, disc, horseshoe) on the demonstrator and compare field patterns
Use laminated activity cards to guide investigation questions like “How far does the field reach?”
Pair with drawing tasks where learners sketch the field lines they observe
Turn it into a group challenge: predict which magnet will produce the widest field
Product Details
Suggested age: 8+ years (supervised use)
Measurement: approx 22 cm (L) x 12 cm (W) x 1 cm (H) acrylic block based on typical dimensions for 2D field demonstrators
Includes: 1 acrylic magnetic field demonstrator. 
Spare Horseshoe can be purchased using code: SER1052589B
Safety information: Contains iron filings in fluid sealed in acrylic; not to be opened; supervise during use; keep away from very small children due to small magnet use and choking hazard