When you run out of batteries, but you have a few lemons at home. To start, we put copper coins and galvanized nails on different sides of lemons. Then we connected the nail to the copper coin on the next lemon in a line with a wire....

We have made a butterfly with Max from a piece of hard paper that can balance on a tip of a pencil. Now Max is looking for magnets to explain why it doesn't fall.

Heating up the air inside a plastic bottle with hot water and then cooling it down with cold to see how balloon reacts.

If clear gel balls are submerged in water, you cannot see them. It is how Alex did his trick in the previous video and it is what makes this activity so fun for Max.

Experimenting with plastic bottles, straws and water

If you have a balloon and a straw at home, you can make this fun spinning balloon.

It’s just mesmerising to watch water beads lava lamp powered by Alka-Seltzer.

Why not to start a solid foundation in physics in a single afternoon activity learning to balance counterweights? DIY tutorial for making scale using hanger and plastic bottles.

Checking with Alex how strong spaghetti actually is. First, we easily break just one piece but have a look how easy it is to break a bunch of them.

This is fun funnel experiment that proves that an empty bottle isn't, in fact, empty and to fill it with water we need to make sure that air can escape. If a funnel is properly sealed to a bottle and a lot of water is poured into it at...

Classic egg in a bottle experiment turned upside down. We used hard boiled egg, birthday cake candles and a bottle with wide neck.

We do different types of activities with boys, but mixing is Max's most favourite thing. Here Max is mixing Yellow and Blue colours with a help of baking soda and vinegar reaction.

Changing the flavour of a classic pepper experiment by using cinnamon instead. The fact is you can use any spices here as long as they float.

This is an impressive but simple experiment for children. We did it with Alex about two years ago, so it was Max's turn now. But this time I added a bit of a twist though. I spread food colouring on the bottom of tea candle, lighted it...

This is how my little scientist inflates balloons!

Alex knows that every time we do an experiment the result should be different from what he normally expects to happen. This time he said that water would not spill if we turn the cup upside down. So I asked him to do just that and water...

Subscribe to my channel and wait for Alex’s space adventure floating drawing! To make your art creation float you need just white board makers, a plate and some water. I have seen a few videos about this technique but they all seemed to...

This DIY toy is from the time I was a child. It is simple but it could blow the mind a person who doesn't know how it is made. Alex was looking for magnets to explain why it moves that way. All you need to make one is a piece of kitchen...

This experiment shows how Pythagoras Cup works. A long time ago Pythagoras made this cup (also known as a Greedy Cup), that empties itself if too much drink is poured.

Don't trust your eyes! If you cannot see it, it doesn't mean that it is not there. When you place a Pyrex stir rod in the vegetable oil, it disappears. The secret here is that vegetable oil has nearly the same index of refraction as...

Base 11/19, the last mine shaft in Loos-en-Gohelle, was transformed into an eco-construction milestone in the early 2000s. The CD2E organization, based at this site, supports over 600 eco-enterprises in the Nord-Pas-de-Calais region,...

You loved my previous DIY toy so much that I decided to show you one more idea of a simple machine that explores motion and force! This device uses the force we put on a wooden stick to make the top piece jump and spin....

When you hold the egg close to the flame, it gets covered in soot. Soot repels water, similar to oil. When we put our sooty egg in the water, it creates a small air bubble around it. This bubble reflects light, and makes the egg look...

5 best cool science experiments with balloons everyone should do at least once