It's a Mag-Lifter! Which I guess... is pretty much a forklift? That uses magnets? Which makes it all future-ey? Well, anyway, here it is, and it all fits together without glue or whatever. The grabbers can move left and right, and go up and down as well.
It's sized for Pocket-Tactics scale models, and a standard human-sized model will inside pretty snugly. If you want this in 28mm scale, I would advise scaling it up by about 165%. I haven't tried it yet, but let me know if you do.
-Models shown are from the United Separatist Militia Pocket-Tactics set: http://www.thingiverse.com/thing:607453