Magnet Marbles - set of 20

These colorful best-sellers will attract anyone's attention, young or old! String them together or create a 3-dimensional structure. Magnet Marbles merge fascination with polarity, the mystery of magnetic fields, and the fun of 3-D interaction. Endless hours of extended learning and play. A great addition to a child's collection of amusements. Each ball magnet is 5/8" in diameter. Ages 4 and up.