for Virtually Perfect by Dan Gutman
Yip Turner spends more time playing computer games than with other kids. For him, virtual reality usually beats reality! So when his dad, a movie special-effects designer, brings home new software for creating virtual actors, Yip is psyched. He and his sister create "Victor," a boy who is smart, handsome, and charming-perfect in everyway. But when Victor leaves cyberspace and invades their world, Yip realizes that there are bugs in the virtual-actor software. Now his family-and possibly the whole country!-may be in danger...
Publisher description retrieved from Google Books.