<br>ENDLESS PLAY METHODS: The balls have endless combinations up to your patience and creativeness. It could fully improve your microcirculation, so as to develop your imagination and creativity.A toy that appeals to you, interesting , unrestricted, unrestrained, your brain and hands are so powerful that it can become a great shape. It's up to you to make all the balls. Not suitable for children under 15 years. <br><br>Specifications: <br>Material : Metal <br>Color : black <br>Weight : 290g,27pcs balls