''The Pacifier" is to Vin Diesel exactly as ''Kindergarten Cop" was to Arnold Schwarzenegger: an attempt to sand the sharp edges off a movie tough guy and show he can play cute with the kids. Fine, but since Diesel is already a B-movie version of Arnold, and since the movie plays like it was cobbled together from sheetrock and carpet tacks, this makes ''The Pacifier" just worth your children's time, and hardly worth yours.
The setup is formulaic and, as these things go, foolproof. Macho Navy SEAL Shane Wolf is assigned to guard the Bethesda, Md., clan of a deceased Pentagon scientist while the widow (Faith Ford) travels to Europe to look for evidence of her husband's Big Invention, a gizmo that jams missile launches. Shane's also on the lookout for this MacGuffin at home, but when the kooky Czech baby sitter (Carol Kane, paying the rent) ups and quits, he's forced into such duties as nappy-changing and curfew-enforcing.