When Oma arrives to stay with Jake, Lizzie, and their parents, they want to make her visit extra special - so off the family goes to Jake''s birthday party, the library, the beach, and many other places! These familiar childhood excursions prompt many questions from Jake and Lizzie. How do candles stay on fire? How do librarians remember where all the books go? How does the sand get so hot? Curious kids everywhere want to know - and no adult has all the answers. How? provides kid-friendly explanations for nearly one hundred everyday mysteries.