Also: Blues at The Brandywine River Museum and Lanchester Fiddlers Picnic By Denny Dyroff, Staff Writer, The Times Some of the final Fountains and Fireworks shows before the historic Longwood Gardens fountains begin a two-year renovation project will happen late this summer. This week, the music of ABBA is featured. One of the top summertime attractions in the Brandywine Valley is the annual Festival...