There is "My Family and Other Animals" by Durrell about his childhood on Corfu. It's a happy, carefree book, with very gentle humor.
"Theophilus North" by Wilder is a novel about a young man gently helping different people overcome their difficulties (many of which are psychological). The book, considering the theme, is remarkably devoid of angst, grief and pathos. It's quite light, respectful and a bit mischievous.
One of my favorite children books is the Moomins book. Moomins are a nice, warm, loving family. This book is like a cozy blanket for cold days.
I will write more if I remember more...