tours of east coast usa

I will arrange tours of east coast usa for me and my family and damn sure this will be a great and fun-filled experience for me. Tell me about the things that I should try there for having fun?

Must say go ahead because there are many things to do for fun seekers like to see the beauty of Niagara, Washington and Boston. If you not listed the names of attractions then must add these names to have your time fully.