The surface tension of liquids (observation)

We observe whether a razor blade can float on the surface of different liquids.

The production of ethylene and its reaction with bromine water

Ethylene, produced by the heating of polyethylene, changes the colour of bromine water.

How to train your seal

How do attendants prompt seal pups to do what they are asked to? They are even willing to come to the shore for us! How can we teach them to do that?

South Africa trailer

Our new educational videos about South Africa are coming soon.

The rose chafer’s life

If we pay close attention as we walk through the forests and across the meadows, we can see miracles. Let’s learn more about the rose chafer.

The math behind gambling: Dice

In dice games the probability of certain events can be relatively easily calculated. Let’s examine two basic situations.

Magic matchstick

You can make a matchstick spinning on two coins without touching it.

Islamic mosques

What do the words jama, minaret and muezzin mean? Watch this next video to learn the answers.

Home-made lava lamp

This is how you can make a lava lamp at home.


This is a video presenting the characteristics of natural and artificial ecosystems.

Bending a jet of water (observation)

A surprising phenomenon occurs when we hold a statically charged ruler near water flowing from a tap.

Surface tension of liquids 2

In this video we are experimenting with food colourings.


Kraków is the second largest and one of the oldest cities in Poland.

Exothermic reaction

When heated, powdered sulphur reacts with powdered zinc, releasing heat.

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