Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'What makes the sound that comes out of my radio?' Originally broadcast on CBeebies Radio.

Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'How does a microwave oven work?' Originally broadcast on CBeebies Radio.

Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'Why does the washing machine make so much noise?' Originally broadcast on CBeebies Radio.

Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'How does a key open a lock?' Originally broadcast on CBeebies Radio.

Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'How does the toilet flush?' Originally broadcast on CBeebies Radio.

Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'What makes my clock tick?' Originally broadcast on CBeebies Radio.

Join Nina, CBeebies' much-loved science expert, to find out about inventions and who invented them. Today's question is 'How does our vacuum cleaner work?' Originally broadcast on CBeebies Radio.