What happens when people say a tongue twister? Do their tongues really twist? To understand tongue twisters, you first need to know how humans make sound. The brain, mouth, lungs, larynx, and vocal words must all work together in order for humans to speak. Featuring TIME For Kids content, this nonfiction reader introduces students to the "science" behind tongue twisters. This high-interest title includes detailed images, stimulating facts, and clear, informational text to engage students as they build their critical literacy skills. The book includes text features such as bold font, captions, a table of contents, a glossary, and sidebars to increase understanding, improve academic vocabulary, and prompt critical thinking.