For the first one I added the upside-down hanging bat to the tree branch and stamped the flying group of bats several times along the right side of the page. I finished with the Happy Halloween sentiment from the set.
For the second one, I stamped the crow from the set on the tree branch to accompany the silhouette blackbird printed on the paper. I cut the sentiment in half (one of the best things about unmounted stamps), so I could fit it into the space on the page.
Spooky, but oh so cool.