1. Triangles

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. 9 July 2015. 15 min

Nina and her Experimenters show why the Eiffel Tower was built with lots of triangles.

2. Pointy Roofs

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. 8 September 2015. 15 min

Nina and her young Experimenters conduct an experiment on how roof tiles keep houses dry.

3. Piers

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. 9 September 2015. 15 min

Nina and her young Experimenters conduct an experiment to explain why piers stay strong.

4. Nests

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. 10 September 2015. 15 min

Nina and her young Experimenters explain how birds keep their eggs safe and warm.

5. Houses

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. 11 September 2015. 15 min

Nina and her young Experimenters discover how builders make holes in walls for windows.

6. Windmills

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. 14 September 2015. 15 min

Experimenters Aaron and Sylvia visit Nina and discover what makes windmills' sails turn.

7. Beaver Dams

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. 15 September 2015. 15 min

Experimenters Bethan, Corey and Rhianna see what happens when you build a dam in a stream.

8. Skyscrapers

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. 16 September 2015. 15 min

Samuel and Sofia discover why skyscrapers need to be stronger the taller they are.

9. Bridges

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. 17 September 2015. 15 min

Alexander, Billie and Marianna visit Nina and discover what a cantilever is.

10. Demolition

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. 18 September 2015. 15 min

Andreea, Soham and Yusuf visit Nina and discover what happens when gas expands quickly.

11. Floating Houses

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. 21 September 2015. 15 min

Experimenters Poppy and Sugar visit Nina to find out how to build floating houses.

12. Rollercoasters

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. 22 September 2015. 15 min

Experimenters Ben, Eryn and Kanie visit Nina to investigate how rollercoasters work.

13. Arches

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. 23 September 2015. 15 min

Experimenters Dylan and Phoebe visit Nina to find out why people use arches in buildings.

14. Lighthouses

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. 24 September 2015. 15 min

Experimenters Livingstone and Oisin visit Nina to investigate how lighthouses are built.

15. Living Underground

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. 28 September 2015. 15 min

Experimenters Taite and Taruni visit Nina to find out why some animals live underground.

16. Living Underwater

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. 25 September 2015. 15 min

Experimenters Lyla and Sandy find out if we could live in an underwater house.

17. Igloos

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. 29 September 2015. 15 min

Experimenters Ethan and Eva discover what the walls of an igloo are made from.

18. Spiders' Webs

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. 30 September 2015. 15 min

Experimenters Hugo and Ugochi visit Nina to investigate how a spider builds its web.

19. Domes

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. 1 October 2015. 15 min

Experimenters Billy and Katy visit Nina to investigate how domes are built.

20. Amphitheatres

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. 2 October 2015. 15 min

Experimenters Arnav and Ayomide visit Nina to investigate what an amphitheater is.