More recently, I found a couple more! :)
Mrs. Sharp's Traditions (by Sarah Ban Breathnach) celebrates Victorian families and sensibilities, but the activities mentioned universally appeal to children in particular. She has clever ideas for rainy days, holidays, preparation parties etc. Because of our prior exposure, the festivals mentioned were not new to us. (I'd still say they're novel for most folks though.)
The new find is The Book of New Family Traditions (by Meg Cox). I'm not even finished with this one, but it deserves mention so far. I like how she looks at even simple transitions like meals or greetings and goodbyes. She has a ton of suggestions to knit a greater thread into our attachments. These threads really assist greater simplicity since those rhythms are things we count on and rest in.