Aloe

There are many uses of equatorial aloe species. Beverages and medications are produced from its juicy leaves.

Catalytic cracking

The oil industry is able to meet the world’s growing need for fuel by a process called cracking.

Traffic signs

It is important to know the rules of the road both for pedestrians and bikers. Prepare some signs and practise their meaning!

Horseweed

One of the most common weeds. It can be found in fields and meadows.

Jumping frog

If folded properly, the frog will be able to jump with a skilful move.

Since when has the dog been angry at the rabbit?

The dog and the rabbit had such a bad quarrel while chopping down trees they have been angry with each other ever since.

The fox and the grapes

Having eaten his delicious chicken, the fox yearned for some grapes, but he was unable to reach the bunches up high.

Orientation with a compass

By using a compass, we can orientate ourselves during a school trip or a hike in the woods.

Measuring the height of a tower

Calculating the height of a classic water tower with a tape measure and lots of sunshine.

The story of Joseph

This is the biblical story of Joseph, the great-grandson of Abraham, the patriarch of the Jews.

The English oak

The most widespread tree species in temperate forests. It grows slowly. Its timber is popular in the furniture industry.

The history of the Macintosh

Apple’s innovation became a new, user-friendly computer with a graphical user interface and a mouse.

Seconds pendulum

How can this pendulum accurately measure time in seconds?

The mallard

One of the most common types of Anatidae, the ancestor of the domestic duck.

Stars of the four seasons

As seasons change, we see different constellations in the night sky. The North Star is easy to identify in a picture taken with long exposure time, as it...

Dangerous plastic

Environmental organisations are against the use of PVC.

3D graph tutorial

Let's find out how to use the 3D graph tool.

Boomwhackers

Have you ever heard about boomwhackers? Believe it or not, these are real musical instruments.

Pinwheel

Let’s make a pinwheel! It is a witty little toy if you give it a go in windy weather, too!

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