The city of Kennewick will hold a grand opening celebration from 1 to 4 p.m. Sept. 11 for its new sports event complex near Southridge High School.

The event also features a special dedication ceremony that will unveil the memorial artifact from the World Trade Center's twin towers that were destroyed in the 9/11 terrorist attacks.

The open house features a lacrosse demonstration, soccer shootout, food, games, a bouncy house and a home run derby for kids. Admission is free.