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Hello boys and girls! Today we are going to talk about how machines and tools work.

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Some tools and simple machines, remember that simple machines are the ones that have only a few pieces, need our energy to work.

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Energy of people. For example, we can turn on and off something, we can twist something, we can push something or we can pull something.

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On the other hand, many complex machines, remember that complex machines are the ones that have lots of pieces, need energy from two different things.

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Some of them need energy from batteries, but some other need to use mains energy.

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To use mains energy we need to have some of these things at home.

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We need to have a socket, we need to have a plug, we need to have a switch and we need to have a cable.

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Ok boys and girls, I hope you understand everything, so see you soon!