Böcker av Nan Walker

First published in the United States of America in 2016 by Kane Press, Inc.

In this story that introduces the math concept of symmetry, Otto and Ava have been best friends since discovering they both have special "mirror names," but Otto worries when Ava befriends new girl Vivian.

Solve kid-sized dilemmas and mysteries with the Science Solves It! series. These fun books for kids ages 5–8 blend clever stories with real-life science. Why did the dog turn green? Can you control a hiccup? Is that a UFO? Find the answers to these questions and more as kid characters dive into physical, life, and earth sciences. If the aliens in the movie don't need sleep, then Peter doesn't either! Right? Books in this perfect STEM series will help kids think like scientists and get ahead in the classroom. Activities and experiments are included in every book! (Level Two; Science topic: Sleep)