It is a popular classical tale for young children, first published in 1962.
The author reveals a story about a heroic ball of wool, that shows to children through pleasant experiences and adventures the principal values, which a child encounters during ordinary days. Through the characters in the book, the young readers naturally experience how to step into the unknown, create new friendships, get to know new people, but also to respect the value of themselves, and to be able to set own boundaries. Guľko Bombuľko loves helping and he has a good heart. However, can he give himself away to everyone? The book was published in 1962, then followed by other editions including 2009, when it was awarded The Most Beautiful Book of the Winter.