We connected fruits, vegetables, processed cheese, almonds, cookies, and candies. The fruits and vegetables worked great, as did the cheese and almonds. But the cookies and candies didn’t play.

Why? Because fruits and vegetables contain a lot of water, and it’s the water that conducts electricity and completes the circuit. Cookies and candies are dry, so Makey Makey couldn’t detect a signal.

Our conclusion: “If it has water – it will play. If it’s dry – it won’t.”

3c /SP-5/ Słupsk/ POLAND (D. Dankowska)

The results showed that the bean plant in the light grew faster, had green leaves, and looked healthy. The plant kept in the dark was tall, pale, and weaker.

The experiment confirmed our hypothesis that light has a positive effect on plant growth. We learned how important proper conditions are for growing healthy plants.

II e Primary School in Gościcino, Poland/Arleta Formela

II e Primary School in Gościcino, Poland/Arleta Formela

Inspired by the musical experiments shared by our partners from Koszalin, we took on the challenge and started creating our own music and rhythms using Boomwhackers and virtual Korbo blocks. Thank you, Edyta Jurys!

Class 3 c SP-5 Słupsk, Poland (D. Dankowska, K. Wojcieszek)

Tatjana <orešković, 2. a, OŠ Frana Galovića, Zagreb

We learned that this fish lives in great depths. In the dark, no one can see it. It doesn't need beauty to survive. It uses light to hunt its prey, that's how it feeds.

Prepare:

Baking soda

Vinegar

Water

Food colouring (optional, to colour the lava)

Glass bottle

1. Prepare the base of the volcano:

Use a glass bottle as the core of the volcano. The bottle can be placed in the centre of a large plate or tray to collect the spilled lava.

2. Start the eruption:

Pour warm water coloured with food colouring and vinegar into the bottle. Quickly add the baking soda.

3. Watch the eruption:

The mixture will react, creating foam and “lava” that will begin to flow out of the volcano. The visual effect should be spectacular, especially if you have used food colouring.

Class 3a / SP3 - Piotrków Trybunalski/ Poland - K. Ślęzak

– a glass/bottle or jar

– oil – 3/4 of a glass

– water – 1/4 of a glass

– food colouring + syringe

– effervescent tablet – calcium, magnesium or vitamin C

Instructions:

First, pour water (a small amount) into the glass.

Then add oil so that there is about 2 cm of space at the top of the glass.

Now it's time for the food colouring – about 10 drops will suffice.

Finally, drop in the effervescent tablet. You can break it into several pieces and drop them in gradually, or drop the whole tablet in at once.

Now you can admire the levitating bubbles.

Class 3a SP3 Piotrków Trybunalski POLAND/ Katarzyna Ślęzak

In our class, we conducted a fun experiment with baking soda, vinegar, and a balloon! 

First, we put a teaspoon of baking soda into the balloon, and then added vinegar.
Soon, we could see how a chemical reaction produced carbon dioxide (CO₂), which inflated the balloon and made it grow. 

The experiment showed us how simple ingredients can create amazing chemical reactions. It was also a great opportunity for learning through play, observing together, and drawing conclusions. 

1. Earth Model from Clay:
Make a ball with colored layers:

• red core – the hot center of the Earth,

• orange mantle – the hot middle layer,

• yellow crust – the surface,

• green and blue – continents and oceans.
  Cut the model in half to show where the heat comes from.

2. Demonstrating Heat Energy:
Place the candle on a base and position the pinwheel about 10–15 cm above it.
Light the candle and observe – warm air rises and makes the pinwheel spin.
This shows how heat can be converted into mechanical energy.

💡 Conclusion:

Heat from inside the Earth (geothermal energy) can be used to power turbines and generate electricity – just like the candle’s heat makes the pinwheel move.

(class II e PS in Gościcino, Poland /Arleta Formela)

EXPERIMENT STEPS:

1. Put some hair gel and red coloring into a bowl. Mix well. Transfer the mixture into the plastic bag.

2. Put some hair gel and yellow coloring into a bowl. Mix well. Add this mixture to the same plastic bag.

3. Mix the red and yellow mixtures inside the plastic bag by pressing it with your fingers.

4. Observe how the color changes.

Experiment with other colors, observe what new colors you can create, and enjoy the joy of discovery. Allow children to freely create, try, explore, and notice the color changes themselves – this nurtures their imagination, curiosity, and creativity.

EXPERIMENT STEPS:

1. Pour water into the ice cube trays and freeze it in the freezer.

2. Take the trays out of the freezer.

3. In the glass, draw what the water turned into in the cold.

4. Boil water in the kettle. Observe what happens to the water above the kettle.

5. In the glass, draw what part of the water turned into in the heat.

6. Pour hot water into the transparent bowl.

7. Place a plate on top of the bowl. Put ice cubes on the plate. What is happening to the ice cubes?

8. In the glass, draw what the ice cubes turned into.

9. Make a conclusion about how water changes when the temperature changes.

Class 2b_ SP-5 Słupsk (Joanna Mateńko)

Materials needed: water, a glass, a cup, shaving or hair foam, food coloring or gouache, a teaspoon, a pipette.

Procedure:

1. Pour water into the cup, add a few drops of blue dye, and mix.

2. Pour water into the glass. Spray foam onto the surface of the water.

3. Use the pipette to draw up the blue water from the cup and drip it onto the foam in the glass.

4. Observe how the blue water accumulated in the foam begins to drip down—“rain.”

Discuss the children's observations, insights, and questions.

Huragan w słoiku powstawał w momencie reakcji spalania tlenu w słoiku- przyspieszaczem był alkohol w perfumach- wówczas świeczka która stała zanurzona w wodzie( udającej ocean), gasła a woda wsysana była do wnętrza słoika, pojawiał się również świst przypominający odgłosy silnego wiatru .

Siłę huraganu mogliśmy zobaczyć, gdy nauczyciel podnosił do góry tacę obciążoną szklankami z wodą.

Title of the experiment:

The Self‑Inflating Balloon

Goal:

To teach children about chemical reactions, gases and their properties, as well as how carbon dioxide is created.

For children aged: 5–8
Guiding question: Can a balloon inflate by itself?

Materials needed:

• plastic bottle

• balloon

• baking soda

• vinegar

• funnel

Procedure:

1. Pour about one‑third of the bottle full of vinegar.

2. Using a funnel, add 1–2 teaspoons of baking soda into the balloon.

3. Carefully stretch the balloon over the neck of the bottle, making sure the baking soda does not fall inside yet.

4. When everything is ready, lift the balloon so the baking soda drops into the bottle with vinegar.

5. Watch as the balloon begins to inflate on its own!

Tip: Try several attempts. Use different amounts of baking soda and vinegar to see how this changes the speed at which the balloon inflates.

Conclusion from the experiment:

The reaction between baking soda and vinegar releases carbon dioxide (CO₂), which fills the balloon and causes it to inflate.

They created wind turbine models, which proved to be a fantastic way to develop students' creativity, design thinking, and collaboration.

In class, they calculated that the turbine blade rotates 120 times in one minute.

For the experiment, they prepared models of two houses: they covered the roof of one with green moss. Both houses were heated with "artificial sunlight." At the beginning and end of the experiment, they checked and compared the temperature inside the house. The house with the green roof maintained a constant temperature, while the house without the green roof experienced a rise in temperature. The students learned that this solution benefits people and the environment. The system acts as a natural filter – plants absorb carbon dioxide and particulate matter while simultaneously producing oxygen. In the summer, it reduces indoor heat.

The photos show the students connecting components to create a closed circuit—and when everything was connected correctly, the LEDs began to glow with an intense red light. This was the best reward for their careful work and precise assembly!

🔍 For the experiment, the students used:

• lemons,

• copper wires,

• metal nails,

• LED diodes,

• wires.

During classes, students learned about the principle of a closed circuit, checked which elements conduct electricity, learned why different metals can "create" voltage, and tested how the operation of a circuit changes with different connections.

It turned out that plants need light; otherwise, they lose their green color because they lose chlorophyll. That is why leaves change color in autumn.

In our Animalland, we want there to be as much light as possible.

The children prepared the experiment on their own – filling balloons with water, adding dyes, and observing how the colors mixed. The balloons were then placed outside in freezing temperatures, which sparked curiosity and excitement as students waited for the results.

This project provided an excellent opportunity to explore changes in the states of matter. Through direct experience, students discovered that water turns into ice when exposed to low temperatures. They observed the properties of ice, including its structure and temperature.

The colorful ice balls also created a great opportunity to talk about colors, light, and changes in nature. Students recorded their observations, made drawings, and compared their predictions with the final results.

The project supported the development of curiosity, observation skills, cause-and-effect thinking, and fine motor skills. It was a valuable learning experience in which education became an exciting adventure.

Ingredients:

a glass/jar/bottle;

oil;

water;

dye;

carbonated tablet.

Procedure:

Fill the glass to ¾ of its volume with oil. In a separate container, mix a small amount of water with dye. Pour the dyed water into the oil, add glitter. Then drop in the carbonated tablet and observe the effect. What will happen in the glass will provide you with unforgettable experiences. The rising drops of dye will start to dance in the container under the influence of the carbonated tablet. We will see real lava.

Explanation:

It's all thanks to the polyethylene from which the bag is made. At the moment when the polyethylene is torn by inserting the crayons, its molecules move closer together and clamp around the crayons.