Makerlabs are popping up all over the place; universities are building them in an effort to prepare engineering students for the rapid prototyping revolution which is being brought on by the rise of 3D printers and laser cutters, and small collectives of hardware hackers are banding together to pool resources. Unfortunately, making these sorts of tools available to younger children is a mostly unsettled frontier, as elementary schools and summer programs haven't yet found a means by which to bring maker tools to schools.
And yet early childhood is such a crucial time. Kids under the age of ten are still forming their conception of the world, and if they get a chance to play with 3D printers and lasers during this stage of their development, these things will seem normal. These kids will get a head start on the future.
Bay Area Discovery Museum realizes this, and so their Fab Lab is designed specifically to get younger children interested in engineering as early as possible. We honestly can't support this initiative enough. Pay them a visit, and tell them we sent you.