does anyone have an idea on how to make a toy which uses a physics theory?

Question

must not be too difficult to make. students are making it.

Answer 1

There are few sites which are dedicated to make scientific toys.

The best site that I like is
www.sci-toys.com
It has simple to advanced level projects including lasers, magnetism, electrostatics, almost all the toys are based on some Physics law.

Using this site, one can make a RADIO in 10 Mins, and can actually listen the local stations

Or, you can transmit your voice through a laser beam.....upto 2 kms....

Or, one can make a 10 min Railgun.......
it is a total illustrated site.

the complete list of toys is:

Magnetism:
Magnetorheological fluids
A magnet in mid-air
Pyrolytic graphite in mid-air
The Gauss Rifle: A Magnetic Linear Accelerator
A Curie-effect heat engine
A Magnetic Ring Launcher

Electromagnetism:
An electric motor in 10 minutes
Fun with High Voltage
A 10 minute railgun
A 30 second motor

Electrochemistry:
A plastic hydrogen bomb
Building your own solar battery.
Building a Hydrogen Fuel Cell.

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

Thermodynamics:
Simple heat engines
World's simplest steam boat
A simple rocket 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

Aerodynamics:
A Bernoulli levitation ball
A Homemade Vacuum Pump
A Classic Propellor Toy

Light and optics:
Simple laser communicator
Make a spectroscope from a CD.
Making permanent rainbows.
The impossible kaleidoscope
Make your own 3D pictures
Make a solar hotdog cooker
A solar powered marshmallow roaster

Biology:
Photography through the microscope
Video through the microscope
Listening to Electric Fish
Using a video camera as a microscope

Mathematics:
Kaleidocycles
A Geodesic Dome

Computers and Electronics:
A Computer Controlled Transmitter
A Free Space Laser Data Transmitter
Fun with Solderless Breadboards
A Digital Thermometer
A Simple 1 Watt Amplifier
Science Toys
Make toys at home with common household materials, often in only a few minutes, that demonstrate fascinating scientific principles.

To make it easier to build some of the toys described in the book we have a catalog of parts and kits.

Some of the catalog items are:
Film Can Cannon kits and parts,
Piezoelectric Ignitors,
Cannon fuel.

Super Magnets,
Pyrolytic Graphite,
Bismuth Shot,
Magnetic Levitation kits,
Gauss Rifle kits.

Crystal Radio kits and parts,
Radio Transmitter kits and parts.

Lasers, Lenses,
and Diffraction Gratings

Metal That Melts In Hot Water,
World's Simplest Steamboat,
Happy Drinking Bird

Answer 2

A slingshot uses the forces of physics. An object in motion stays in motion unless acted on by an outside force. Or the converse. A piece of paper does not move unless acted on by an outside force. The slingshot is the outside force the black board (stopping the paper from moving ) is also an outside force.

Answer 3

hi kkxx

"THE STRAW THROUGH POTATO" if u can call it a toy...

you can find the exact theory and video via these two links

http://www.stevespanglerscience.com/experiment/170

http://www.metacafe.com/watch/328616/straw_and_potato/

Now, this isn't new BUT add a new twist to it

challenge them to make a straw (with no other materials) that can pierce through the CENTRE of the potato, not the side, with one motion...

99% of the time , they will be amazed...

hope this helps!

Answer 4

The cool thing, is that when thrown, all toys follow physical law with regard to projectile movement. Hence, trajectory, gradients, force of impact and air resistance are all there, playing their role.

Answer 5

try rubber band powered vehicles.
out of touch on my physics course from 100 yrs ago,
but you hasve the stored energy in the rubber band once its stretched, then the energy of it moving after the rubber band has depleted itself (kinetic?), then of course the energy in the friction of the contact surfaces (tires, blades, etc), and the resistance of the forces working against it (wind resistance, etc.)
good luck on whatever you do

Answer 6

Tops, balls, cars that roll on tracks and down inclines, anything that spins or flies, shooting marbles, the list is endless.

Answer 7

A ball (gravity, force, acceleration, motion [Newton] ..etc).

Answer 8

all toys do

the ones that move anyway, and when you throw them , they all move....even Barbie

tops, elastic bands, motors.... they all do