Physics
Motion, energy, magnets & light. Here are all 25 working models in this field — each with a full build and working principle.
Homopolar Motor
A single AA battery, a magnet and a copper-wire loop spin into the simplest electric motor that actually works.
Switchable Electromagnet
Coil insulated wire around an iron bolt and a battery turns it into a magnet you can switch on, off, and strengthen at will.
Pendulum Timer
A swinging mass keeps remarkably steady time — build one and discover what really sets its rhythm.
Balloon Hovercraft
A balloon, a CD and a bottle cap make a puck that glides almost frictionlessly across a table.
Newton's Cradle
Five swinging balls trade momentum down the line in the classic desk-toy demonstration of conservation laws.
Electromagnetic Train
A battery wrapped in magnets shoots through a bare-copper coil tunnel like a tiny maglev train.
Water Bottle Rocket
Pressurised air and water blast a soda bottle skyward — a vivid lesson in thrust and Newton's third law.
Cardboard Periscope
Two angled mirrors let you peek over walls and around corners — the same trick submarines use.
Hand-Crank Generator
Spin a magnet past a coil and you generate real electricity — enough to light an LED by hand.
Rubber-Band Car
Wind up a rubber band and store energy that launches a lightweight car across the floor.
Brushed DC Motor
Build a spinning motor with a real commutator from a coil, magnets and a battery.
Wind Turbine Model
Blades catch moving air and spin a small generator to power a light — clean energy on your desk.
Archimedes Screw
A spiral inside a tube lifts water uphill just by turning — an ancient machine you can build today.
Marble Roller Coaster
Loops, hills and drops show kinetic and potential energy trading back and forth as a marble races the track.
Popsicle Catapult
Stored tension in a lever flings a projectile across the room — simple machines meet projectile motion.
Newton's Colour Disc
A spinning disc painted with rainbow segments blurs into white — proof that white light is a mix of colours.
Static Electroscope
A jar and a strip of foil reveal invisible static charge by spreading apart on their own.
Mousetrap Car
A snapping mousetrap's spring becomes a drivetrain that powers a car several metres in one shot.
Hydraulic Arm
Water-filled syringes transmit force through tubes to move a cardboard arm — fluid power you can grip with.
Floating Bernoulli Ball
A ball hovers in an angled air stream and refuses to fall out — a striking demo of airflow and pressure.
Two-Lens Telescope
Two lenses in a tube magnify distant objects — build the instrument that reshaped astronomy.
Magnetic Levitation
Repelling magnets float a pencil or track section in mid-air — a tabletop maglev demonstration.
Solar Heat Spinner
A pinwheel suspended above a warm surface turns from rising air — a model of convection at work.
Singing Wine Glasses
A wet finger on a glass rim sings a clear note — tune several glasses into an instrument of resonance.
Balancing Bird
A paper bird perches impossibly on its beak — a hands-on lesson in centre of gravity.