Seventh-grader Jacoby Yliniemi dropped a bowl of sand into the bucket being held up by his group’s toothpick bridge, bit his lip and then relaxed. The bridge was safe. At least for a second. Another ...

Superior High School student Ari Robillard, second from left, reacts as her teammates, Taylor Schultz, left, and Paige B. Johnson balance a weighted bucket on their toothpick bridge at the American ...

Middle and high school students in the San Antonio Prefreshman Engineering Program demonstrated their bridge-building skills on a miniature level Wednesday. Two-person teams were instructed to build a ...