Spectators receive balloons with the Roanoke Inn logo at the “Out of This World” themed Summer Celebration parade on July 8. Katie Metzger/staff photo

R2-D2 rolls down 78th Avenue Southeast during the parade. The theme for this year’s Summer Celebration was “Out of this World.” Katie Metzger/staff photo

Kids ride bikes and carry balloons in the annual Summer Celebration parade on July 8, representing the Mercer Island Country Club’s Silver Dolphins. Katie Metzger/staff photo

Members of the Mercer Island West Highland Club walk their dogs in the Summer Celebration parade. Katie Metzger/staff photo

Mercer Island cheerleaders march in the parade. Katie Metzger/staff photo

This year’s parade featured members of the Mercer Island Chinese Association. Katie Metzger/staff photo

Members of the Mercer Island Veterans of Foreign Wars (VFW) lead off the parade through Town Center. Katie Metzger/staff photo

Members of the Cascade Lodge Sons of Norway play music while walking in the parade. Katie Metzger/staff photo

Islanders applaud the Mercer Island Fire Department at the end of the Summer Celebration parade. Katie Metzger/staff photo