First was a Mario-theme where Sarah and her husband Robert had little mustaches and Mario hats and crowns. They made a yellow Mario Question box and out fell a certain color balloon (hint hint: scroll down to see).
Then, of course, because Sarah's a Disney fanatic she did a Sleeping Beauty theme - "Make it pink, make it blue". If you haven't seen the movie or it's been awhile here's the inspired clip:
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You can see more of her ideas on her blog: Disney by Design.