This unique toy gives "learning the nuts and bolts" new meaning. Using a multicolored assortment of plastic screws, wrenches, nuts, bolts, and screwdrivers, kids can create designs by attaching and detaching a slew of shapes to the special board (which folds up to become a handy carry-all for the set). Though the concept seems basic, kids find hours of enjoyment out of this open-ended toy. Plus, while they're focused on using tools to create designs and structures, they'll also be developing fine motor skills, color and shape recognition, counting, and the basics of building and engineering! (International Playthings, $21.99)