The Professor loves
magnets! (You can tell...there are a lot in
the gift shop.) Do you know what makes a
At this time, there are four basic forces
that are known: gravity, electromagnetism,
weak, strong. What creates these forces?
There is speculation among
particle physicists that these forces
are the result of photons that are exchanged
between particles. This exchange is what
creates a repulsion or attraction between
various particles, giving us the forces we
call gravity, magnetism, and others that
hold the protons together in the center of
Got that? Yeah, it's complicated.
An easier way to put it is this:
all magnets have two ends, usually
marked "north" and "south," and that magnets
attract things made of
steel or iron. There is a
fundamental law of all magnets: Opposites
attract and likes repel. So, if you have
two bar magnets with their ends marked
"north" and "south," the north end of one
magnet will attract the south end of the
other. On the other hand, the north end of
one magnet will repel the north end of the
other (and similarly, south will repel
A magnet can be made to stick to objects which contain magnetic
material such as iron, even if that object is not a magnet. But a magnet
cannot be made to stick to materials which are plastic, or cotton,
or any other material, such as wood, which is not magnetic.
All you really need to know is
that magnets are fun to play with!
Wheels and More Wheels
you get a bicycle for Christmas? Do you know
what a unicycle is?
Of course, it's obvious that a bicycle
has two wheels (bi- means two)...so a
unicycle has one wheel (because
uni- means one) and a tricycle
has three wheels (can you guess what tri-
The Professor adores wheeled objects, and
you'll find wheels to help you spin on
in his Library at Pennypickle's Workshop.
Sometimes, unicycles are for sale in
the gift shop.