In this episode of Crash Course Kids, Sabrina demostrates how to set up models and trails to find and fix failure points during investigations. [4:01]

How do scientists keep working on a problem if the first solution doesn't fix it? Learn how they use experimental trials to find solutions. [3:00]

Watch as a group of young engineers use the design process to build a bike trailer. The process includes the following: Define the need, brainstorm, design, build, test & evaluate, redesign, share solution. [6:30]