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Mar 30, 2018ryner rated this title 5 out of 5 stars
A truly marvelous series of books for children curious about the world and enthusiastic about math (even if they don't know it yet!). Each 2-page layout provides interesting and often amusing facts about a particular subject, and then three math questions of varying difficulty are introduced. The easiest questions are typically no more difficult than adding or subtracting one-digit numbers, while the most challenging involve multi-step mental processes, though even these questions can still be solved without the aid of pencil and paper. What's more, the author posts daily bedtime math questions on her own website, so even if your family exhausts the problems in all three books there is always more math fun to be had!