Equip the next generation of scientists with a brand new series from Chris Ferrie, the #1 science author for kids! Red Kangaroo has an upset tummy from eating too much junk food! Can she go back in time to fix her mistake? Dr. Chris says, "Yes!" All Red Kangaroo needs to understand are the basics of general relativity. Join Red Kangaroo and Dr. Chris as they explore time and space! Chris Ferrie offers a kid-friendly introduction to general relativity in this installment of his new Everyday Science Academy series. With real-world and practical examples, young readers will have a firm grasp of scientific and mathematical concepts to help answer many of their "why" questions. Perfect for elementary-aged children and supports the Common Core Learning Standards, Next Generation Science Standards, and the Science, Technology, Engineering, and Math (STEM) standards. Backmatter includes a glossary, comprehension questions aligned with Bloom's Taxonomy and experiments kids can easily do at school or at home!