The distorted images seen in Christmas-tree ornaments and reflecting balls
The cafe-wall illusion, in which rows of tiles tilt that should not tilt at all
Drop two stacked balls from waist height the top ball may bounce up to the ceiling;
Shock-front phenomena and other oddities to entertain a bored airline passenger
Some entertaining lessons in optics that may make air travel easier to endure
Shadows cast on the bottom of a pool are not like other shadows. Why?
Does convection or the Bernoulli principle make the shower curtain flutter inward?
Icicles ensheathe a number of puzzles: just how does the water freeze?
How to map electrically charged patches with parsley, sage, rosemary and thyme
The feathery wake of a moving boat is a complex interference pattern
What explains subjective-contour illusions, those bright spots that are not really there?
How to capture on film the faint glow emitted when sticky tape is peeled off a surface
Fluid interfaces, including fractal flows, can be studied in a Hele-Shaw cell
Now there is Rubik's Magic, a new puzzle that provides a study in permutation operators
Sticky threadlike substances that tend to draw themselves out into bead arrays
Music and ammonia vapor excite the color pattern of a soap film
Why a fluid flows faster when the tube is pinched
Puzzles in two and three dimensions, and ways to simplify their solution
Concerning disappearances, including the Cheshire cat's odd vanishing act
Making a barometer that works with water in place of mercury