Group 1 - The articles explore the theme of childhood joy and games through ancient artifacts, highlighting the timeless connection between children and play [1][2][3] - Various ancient items, such as a bronze plate from Jin and a ceramic dog from Tang, are described as representations of children's playful experiences and emotions [1][2] - The depiction of children's games, such as "竹马戏" (bamboo horse play) and hide-and-seek, illustrates the continuity of childhood joy across different historical periods [2][3] Group 2 - The craftsmanship of ancient artisans is emphasized, showcasing their ability to capture the essence of childhood in their works, such as the painted scenes on porcelain bowls [3] - The articles suggest that despite the passage of time, the essence of childhood curiosity and happiness remains unchanged, reflecting a universal theme of joy [3] - The narrative invites readers to engage with history through the lens of childhood, suggesting that the experiences of joy and play are fundamental to human nature [1][2][3]