Robert Sabuda is the current master of pop-up books. His website not only features information on his own books, but also provides patterns for simple pop-ups you can make yourself. It’s a fun site to explore. Mix and match his designs to form new creations.
I just checked (March 2018) and the website is down, but I still think the Make It Yourself Pop Ups are still worth making.
UPDATED March 30 2018: I fixed the dead link with the Internet Archive version, added a sentence explaining that and my current signature block.
Sarah S. Uthoff is a nationally known Laura Ingalls Wilder authority and has presented at five of the Wilder homesites, many times at the Herbert Hoover Presidential Library and Museum, many conferences and numerous libraries, museums, and events around the Midwest. She is the main force behind Trundlebed Tales fighting to bring the History, Mystery, Magic, and Imagination of Laura Ingalls Wilder and other greats of children’s literature and history to life for a new generation. How can you help? Attend one of her programs, schedule one yourself, watch her videos, listen to her podcast, look at her photos, and find her on Facebook , Twitter , Google+, LinkedIn , SlideShare, and Academia.edu . Professionally she is a reference librarian at Kirkwood Community College and former director of the Oxford (Iowa) Public Library.