We imported the latest toy using solar cell last week from German.
Unfortunately this toy's price is too high for children to buy, we will only demonstrate and teach with it.
In this month you will learn about "solar cell" and make toy using it.
In this week you will learn the overview of solar cell.
Solar cells are "the oil of the sky"
Vocabulary : alternative energy, photoelectric, mono-crystal cells, multi-crystal cells
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