The Young and Prodigious T.S. Spivet is a 3D caprice from Amélie’s Jean-Pierre Jeunet. Jeunet’s films more and more resemble Hallmark greetings cards. Schmaltz and cardboard re-combine here in celebration of a fictive Montana boy (drawn from Reif Larsen’s novel) who goes to the nation’s capital to claim an inventor’s prize for building a perpetual motion machine. With its pop-up visuals and picaresque plot, the film is so arch, ingratiating and wacky-cute that you want to strangle it. Same for Helena Bonham Carter as mad-but-adorable mom and Judy Davis, mugging for her life as a Smithsonian Institution greeter.