featured lessons

click to view
Ball Drop
Stacked Ball Drop - Lessons in Conservation of Energy and Momentum
vortex chamber
Smoke Ring Machines and Dolphin Bubbles
magnified penny
Measuring the Density of Pennies
forces on the upside-down water glass
Upside-down Water
flaming vortex
Tabletop Flaming Hurricane
slow motion magnet
Slow Motion Magnets
Pendulum Wave
Pendulum Waves
Mona Lisa negative
Yang and Yin - negative afterimages
Balancing Magnetic Coins
Minimalist Motors
rail gun with magnets
Classroom Rail Gun
safety pin motor
Safety Pin Motor