World Book for Kids: there are articles for U.S. Flag, Statue of Liberty, Star Spangled Banner, Liberty Bell. Open World Book first and then the links below should work or search for the topics directly in World Book.
More U.S. Flag Information: with video
Statue of Liberty Information: with video
Bald Eagle Links: with video
Grade 2: U.S. Symbols
Watch this short video on U.S. Symbols from Brain Pop Jr.!
Ben's Guide to U.S. Symbols (from Learning Adventures)