In this lesson, children are introduced to the concept of money, specifically focusing on sorting and recognizing euro coins up to 10 cents. The teacher uses both real and visual aids, such as showing the coins and setting up a makeshift shop, to teach the children how to identify and differentiate between the coins based on their value and size. Vocabulary covered includes terms like “cent,” “euro,” “costs,” and “how much,” with a focus on practical exercises using coins to aid understanding.