I love all the cute little snag 'em stamps that are only $1. There are fun summer ones with popsicles and ice cream cones and some "wild" animal stamps lions and tigers and panda bears, oh my! Plus many others, check them out.
My favorite thing that came is the Build-A-Card pad kit. It's a pad of 7"x10" patterned card stock that's already scored and comes with mats, stickers and envelopes. The photo doesn't do this kit justice.