The set contains 795 pieces (but no minifigs), a sticker set, and two sets of instructions. It is marked for ages ten and older, but I'm thinking it would greatly depend on your ten-year-old if you'd want a kid that young to be playing with injection molding. The molding machine is an almost exact replica of the one you'll see on the tour, with great attention to detail. You can also build the original 1949 hand-crank molding machine with this kit.
I really, really want one. Especially since each one is marked with what number it is in the production run...of 68. Nothing like a little exclusivity to make me drool over a new toy.
Source: Red Ferret