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Discover natural scientific phenomena in the bathroom (Lilu’s House)


Why does the mirror fog up when you take a shower? Why do you see your reflection not upside-down in a shower head as you would in a spoon? And why is clean water coming out of the tap even though it comes from the ground?

From codensation to the reflection of light to the circulation of water - there are plenty of scientific phenomena to discover in a bathroom! This teaching unit offers children various opportunities to investigate and explore while simultaneously training their skills in speaking, reading and writing. The short stories and corresponding experiments can be read and done independently of each other and are adaptable regarding their order.

Find below the material as PDF ready for download as well as some additional material here.

The teaching unit is taken from the brochure ‘Lilu’s House: Language Skills through Experiments’. The complete brochure is available free of charge and can be ordered via email (to or downloaded. It was developed by an international team of primary school teachers from seven countries.

Authors: Heidrun Boll (DE), Majken Grünfeld (DK), Jitka Houfková (CZ), Kirsi Rehunen (FI), Monica Zanella (IT)

Lilu’s House: Bathroom Wonders
Lilus Haus: Badezimmer-Zauber

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