This DIY mobile kit allows you to discover the magic of physics while creating your own work of art. The kit includes interchangeable parts with 12 shapes, and an adjustuble rubber holder that slides to keep your creation balanced. Easy deconstruction and reassembly allows you to discover countless new arrangements. Build your mobile from the bottom up, balancing as you go. Combine kits to create extra-large designs of your own imagining. Made in North Carolina, USA. Ages 9 years and up.