The great thing is, you can make text collages (think Family or Ancestors or your surname!), add colored borders to the photos, use any shape, or even customize it to make all those photos create another photo of their own (you'll need a lot of photos to that!). For $25, you can upgrade to a personal pro product which will remove the watermark, create and save templates, and give you the ability to rotate, move and reorder photos within a collage.
Doesn't this sound like fun? Now go on, get busy playing! And thanks, Randy!