Grimm's Monochrome Rolling WheelThis Grimm's Monochrome Rolling Wheel inspires children to crawl and walk after it: 3 wooden balls inside makes a rattling sound. Grimm's monochrome toys are designed with maximum reduction in both form and colour. And the high contrast in colour, as well as textured surfaces of the monochrome series of toys help to develop individual needs. Children with visual handicaps will be motivated to discover the world around them by discerning a more visible