Magnetic Acrobats, Bubbles, Pink on Green/Yellow Made with Rare Earth Magnets. Each set includes 4 performers, a base plate, a ball, prop and hoop. The pieces can be configured in a nearly infinite array of different positions and still retain their balance - much the way real circus acts can do. Figures are made from durable ABS, the spiral and hoop from super strong polycarbonate. For grownups and creative kids alike