An interactive lapbook is a fun way to teach about United States Symbols. I recommend teaching one symbol each day. Start with a book, video, or internet resource to teach about the individual symbol. I love using the website PebbleGo, if your school has a subscription.
Here are the individual projects:
The White House
Students create a white house pocket. They fill out fact cards to store in the pocket.
The Statue of Liberty
The Liberty Bell