full episodes downton abbey

This story that Rob has found in the paper seems impossible - what do you think?

This story that Rob has found in the paper seems impossible - what do you think?

Deane and Rob make and test a string telephone with two plastic butter containers. Also, a matchbox string telephone is shown.

Deane demonstrates a simple technique for finding compass directions without a compass.

Folk toys have persisted unchanged for hundreds of years but, as Rob shows, they are much easier to make with modern materials.
This is a classic folk toy - in various forms.

Deane makes a rubber-band motor for a toy boat. It is made with a cork, a paper clip, rubber bands, plastic beads and a piece of plasticine.

In Queensland, Australia, deadly jellyfish keep you out of the water just when the weather makes bathing most attractive, but how do these tiny creatures pack such a lethal punch? Rob makes a simple model that shows how their stinging cells work.

Deane shows how to make a cardboard giraffe with a sliding neck - to measure the height of a growing child. It,s fun to make and attach to the bedroom wall.

Changes of state -- melting, freezing, boiling, condensing-- involve heat transfer , but rearranging rubber molecules from ordered to disordered has the same effect, as Rob shows with a balloon.

This is obviously a set of something, but what do you think it is?

Rob shows how the eye works to create a blind spot in everything we see, and how we get the illusion of light simply from pressure.

How does the brain decipher a picture? Rob shows the importance of masking and perspective in creating illusions of reality

These old pincers look ferocious but, as Rob explains, they were really a safety device. What do you think they were for?

Rob deciphers this impossible coded message easily with red cellophane spectacles.You can easily do the same.

Deane and Rob estimate the number of nails in a wooden house and the number of hairs on the head.