Parents' Guide to Steamboy

Set in 1866 in England, STEAMBOY centers on Ray Steam (voiced by Anna Paquin), the resourceful teen son in a family of inventors, but he hasn't seen his father Edward (voiced by Alfred Molina) or his grandfather Lloyd (voiced by Patrick Stewart) since they left to invent the Steam Ball, a small metal sphere of ultra-compressed liquid so mighty it could run a city. The Steam Ball arrives in the mail and Ray is told to protect it no matter what. Right away, a gang tries to take the Steam Ball. They're allied with Edward Steam, who was badly wounded in a lab accident but has rebuilt himself as a sort of cyborg. The same mishap has left Ray's grandfather Lloyd wildly opposed to technology, and the raving old man gets locked in the bowels of the Steam Castle, the family's fortress-style display at London's Great Exhibition that needs the Steam Ball to work. Ray is torn between his grandfather, who tries to sabotage the Steam Castle at every opportunity and his father, who wants to create more and more machines. The Steam Castle is a showcase for new weapons, offered for sale to the nations of the world. Edward thinks this is a good thing; Lloyd does not, and neither do the authorities and rival inventors, who launch an attack. London turns into a battleground and each side unleashes wilder and wilder engines of destruction (throughout, however, human casualties remain extremely low).