For older children, elementary aged, though simple enough that many activities would work for preschoolers. Several good ideas in here, but also several that are so-so. The book also suggests children leave apple cider out for a week and then drink it -- that bitter taste is the alcohol, says the book. I don't actually think that's harmful, but it's sort of cracking me up that this book suggests kids make their own booze.
Anyway, I took away very little from this book, but I could see older kids getting more from it.