Children Play Outdoors 1973

Three thematically related novels. The first is "Mother, father and me". The adults have hard time answering the kid's questions. Young Yulian sees that his parents are arguing. He cannot explain how his dad left the home, since his nightshirt and bed are there. The parents send Yulian to his grandpa at the village. The kid has a lot of fun, there are animals - pig, cock, turkey and he is playing all day. The grandpa dies. When Yulian goes home, he gets lost. Her mother accidentally meets him and embraces him crying. Second novel is "School". Three friends Yulian, Rumen and Hristo use small ceramic tiles for a game of marbles. Where to find them?