70 pieces for construction in a premium box. The lid and the base can be used for great structures. Not suitable for children under 3 years. Choking hazard due to small parts that can be swallowed. Keep magnets away from magnet-sensitive devices such as credit cards, computers, and pacemakers at all times. Magnets have a magnetic north and south pole. The rods in cool colors (white, green, blue, and purple) have outward-facing north poles. The rods in warm colors (yellow, orange, red, and pink) have outward-facing south poles. Opposite poles attract, while like poles repel. All rods in cool colors can be combined with those in warm colors. Other combinations will repel each other.