Bits and Pieces - Newton's Cradle - Iconic Isaac Newton Kinetic Toy - Office Desktop Gift - 5-1/2" wide x 5-1/2" deep x 5-3/4" tall Amusing desktop delight for work or relaxing fun at home. Pull one marble back, let it go and watch each end marble bang back and forth for endless fascination. The perfect desktop accessory. Makes a great gift for your favorite coworker. Measures 5-1/2" wide x 5-1/2" deep x 5-3/4" tall.