How do you build a bridge, or a tall tower, so it’s strong and won’t fall down? This innovative book explains how to use household materials such as drinking straws, modeling clay, cardboard, and tape, to build towers and bridges, and it teaches engineering principles in the process. If this sounds hard or boring, it’s not. The illustrations show kids having lots of fun experimenting, and the activities feel less like school science projects and more like natural explorations of how things works.