More than 600 local children ages 5-14 gathered at the U.S. Patent and Trademark Office in Alexandria on July 31 for the 31st annual Thingamajig Invention Convention, a free event hosted by the YMCA of Metropolitan Washington.
The convention drew 619 participants who engaged in more than 25 hands-on activities designed to promote science, technology, engineering, art, and math skills during the summer break between school years.