breathing in

Boas and mum sit on the couch together. They chat together about this, that and the other. Suddenly Boas asks: Mummy, what means 'breathing'? So I explained to him that you inhale fresh air through your mouth or nose to keep your body alive, to stay healthy.

Interesting question, which I already expected because we have read some books about whales and dolphins, who are mammals, because they have lungs through which they breathe.

Another example of learning at home. It's almost like breathing, a natural surviving tool.