You can give the younger generation some inspirational calligraphy and philosophical calligraphy as a motto on his life journey, accompanying him all the time, urging him to work hard, and teaching him how to behave.
Inspirational calligraphy: God rewards hard work, accumulation of strength leads to strength, industry is better than hard work, God moves vigorously, and if you are careful and end at the beginning, nothing will fail, etc.
Philosophical calligraphy: The best is like water. De Zaiwu, Tranquility Zhiyuan, Jingqi Shen, Honesty Wins the World, Book of Commandments, etc.
Of course there are some calligraphy with good meanings, such as Purple Air from the East, Shi Yahe, Hui Feng He Chang, Virtue brings blessings, immediate success, great ambitions, etc. These are also good works for younger generations.