Builders of all ages can combine these basic units in endless ways. The sturdy cubes, bobbins, and beams slide easily onto the dowels as children experiment with balance and form, design new architectural structures, investigate motion, and create real and fanciful machines and vehicles that turn, twist, and roll. Ages 3-8 years.

This thirty-eight piece set includes (8) Beams - 7" long, (8) Cubes - 1.75", (4) Bobbins - 2.25" long, (12) Dowels - 7" and 10.5" long, and 6 rubber bands. Everything stores neatly in a 12.25 x 9.5 inch wooden tray.