Experience the Ultimate Colour Battle with Colourwhirls! Using Colourwhirls, turn your Crayola Marker into a spinning top! Kids can compete against each other with colourful, creative results! Mark an area on a page for the winning Colourwhirls unit to remain in, see which Colourwhirls unit can spin for the longest or have a competition for the best spiral pattern. Customisable and interchangeable, Kids can personalise their Colourwhirls colour disc and swap them with friends.