When I taught early American history and government, I had my students sign the Declaration of Independence. This government website is fantastic! Select "color printer". Then have the kids select a quill pen for either a colonist, American or Patriot then type their names in the box. Click "submit" and on the next page, "Yes I want to sign". They will then see their names on the Declaration of Independence with all the other signers. This is a great hit with parents, who have told me, they've framed them!
Make sure you use parchment type printer paper. The results are amazing when they're printed out!