• Science Toys
  • Magnetism
    • Magnetorheological fluids
    • A Curie-effect heat engine
    • A magnet in mid-air
    • Pyrolytic graphite in mid-air
    • The Gauss Rifle: A Magnetic Linear Accelerator
    • A Magnetic Ring Launcher
  • Electromagnetism
    • An electric motor in 10 minutes
      • The single brush motor
      • A bigger motor
      • The double brush improvement
      • The 10 minute motor with no magnet
    • Notes about electricity
    • Fun with High Voltage
      • A high voltage motor in 5 minutes
      • A rotary high voltage motor
      • A simple homemade Van de Graaff generator
      • A high voltage ion motor
    • A 10 minute railgun
    • A 30 second motor
    • Listening to magnetism
  • Electrochemistry
    • A plastic hydrogen bomb
    • Building your own solar battery.
    • A flat panel solar battery.
    • Building a Hydrogen Fuel Cell.
    • Homemade Batteries.
    • Collecting Chemical Elements.
  • Radio
    • A quick and simple radio
    • Building a radio in 10 minutes
    • A radio out of household items
    • A simple AM transmitter
    • The Three-Penny Radio
    • A Portable Crystal Radio
  • Thermodynamics
    • Simple heat engines
    • World's simplest steam boat
    • A simple rotary steam engine
    • A simple rocket engine
    • A bimetal strip heat engine
    • A Film Can Cannon
    • A metal that melts in hot water
    • A room temperature liquid metal alloy
    • A simple solar powered heat engine
    • Homemade Ice Cream Maker
  • Aerodynamics
    • A Bernoulli levitation ball
    • A Homemade Vacuum Pump
    • A Classic Propellor Toy
  • Light and optics
    • Simple laser communicator
    • Make your own 3D pictures
    • Making permanent rainbows.
    • A solar powered marshmallow roaster
    • Make a spectroscope from a CD.
    • The impossible kaleidoscope
    • Make a solar hotdog cooker
    • Exploring invisible light
    • A high resolution spectrograph.
    • Time-lapse photography.
    • High speed photography.
    • Stacking photos for high depth of field.
  • Biology
    • Extracting DNA in your kitchen
    • Photography through the microscope
    • Video through the microscope
    • Listening to Electric Fish
    • Using a video camera as a microscope
  • Mathematics
    • Kaleidocycles
    • A Geodesic Dome
    • A Homemade Microgram Balance
  • Computers and Electronics
    • A Computer Controlled Transmitter
    • A Free Space Laser Data Transmitter
    • Fun With Solderless Breadboards
    • A Simple 1 Watt Amplifier
    • An integrated circuit Amplifier
    • Build a digital thermometer