Can you keep water from getting through a material? In this hands-on science challenge, students test different materials to see which ones block water and which ones let it soak through. Children discover that some materials are waterproof while others are absorbent — and connect their findings to real-world engineering of raincoats, umbrellas, and shelters. Includes an introductory page with a real-world connection, step-by-step testing instructions, a student recording sheet for predictions a