Scientist Nina and her young experimenters discover how substances change and react. Here, they explain how things which look the same size can weigh different amounts. Show more
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Scientist Nina and her young experimenters discover how substances change and react. Here, they explain how things which look the same size can weigh different amounts. Show more
The UK's most watched and most loved channel for the under-sixes, dedicated to delighting and surprising its pre-school audience.
