Prince Aha Stool by Kartell. Thought up as a colourful game of building blocks, the Prince Aha stool is composed of two cones to resemble the shape of an hourglass. An entertaining and colourful accessory, a practical stool and stand to place beside the couch or the bed. The pastel colours, the texture of the material used and the geometric design make Prince Aha a flexible product, easily inserted into any setting. Prince Aha Stool by Kartell is designed by Philippe Starck.