And in general, how does the af know to smell? And without a breath - is there a smell in all this? The curious Ada loves to investigate and ask, but when she goes too far in her attempts to find answers, her parents are angry and send her to calm down and think. Where will the thoughts lead her? A rhyming and entertaining book that reminds us that in every curious child hides a little scientist. Ada Granit, a scientist who joins the book Hades, the engineer who builds a stupid copter (Po'alim Library, 2019). Both books encourage girls and boys to experiment and explore, and also to understand that the path to success is full of difficulties. The best-selling American series was adapted for Netflix. Andrea Beatty studied biology and computer science and worked for years in the computer industry. Today she writes children's books at her home in Chicago. David Roberts illustrated many children's books. Lives in London. When he's not painting, he likes to make hats. At the end of the book - an amusing childhood memory of Prof. Ada Yonat, winner of the Nobel Prize in Chemistry.