Build new STEM skills with your own construction and destruction machines! With the help of sturdy, colourful plastic gears, kids design and build their best wrecking machines, complete with a wrecking ball, digger scoop, or other construction-inspired accessories. Build along with the included guide or let your imagination run free. Works with all of our best-selling Gears! sets. Size: 27.7 x 23.1 x 8.4 cm. Ages 6+.