Physics · Electromagnetism
Build a homopolar motor and measure what changes its speed
Make the simplest electric motor from a cell, a magnet and wire, then test how magnets change its speed.
- Easy
- 1–3 hours
- Under 250
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Physics · Waves
Build a ripple tank from a baking tray
Show reflection, diffraction and interference of water waves with a tray, a torch and a phone camera.
- Easy
- 1 day
- Under 250
Earth Science · Seismology
Build a seismograph and record vibrations
Make a pen-and-weight seismograph that draws a trace when the table shakes.
- Intermediate
- 2–7 days
- Under 250
Physics · Optics
Show total internal reflection with a water stream
Trap a laser beam inside a curved stream of water, the way an optical fibre works.
- Easy
- 1–3 hours
- Under 250
Fine Arts + Environmental Science
Sculpt with recycled materials
Build a sculpture from discarded materials that says something about waste.
- Easy
- 1–2 weeks
- Under 250
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