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?

Rob discusses and illustrates some of the main composition rules that have been used by major artists.

Rob shows you some of the most common corals; brain, staghorn, mushroom and so on, but also a surprise inclusion, not made by coral polyps at all.

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

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.

Pop-up books are fascinating but very hard to make. Rob's animated face card is much easier, but still a great deal of fun to design and do.

Deane and Rob present challenging puzzles involving loops and chains made from coloured woollen thread.

A match pushed through a hole in a board magically jumps to another one. As Rob shows, it is an easy trick to set up.

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.

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.

Deane sets up three problems regarding sliding coins colliding with each other on a tabletop.

Deane shows how to make sound waves visible, using a cream container, a balloon
and rice grains.