A combination of sculpture and balance, Bobile is a table top mobile that can be changed, rearranged and displayed as a three-dimensional work of art. Includes base with seven highly flexible rods that are affixed with rubberized spheres and coated with a friction-grip material. Great for a problem solving activity - Where should one start? The answer is surprising! Good for teaching ideas of center of gravity and moments of inertia.The Bobile is easy to balance and manipulate because each rod and sphere is coated with an advanced polymer that has a high degree of friction. Colors may vary.