Sometimes simpler is better! Economical magnets in a basic bar shape feature an opposite pole on each end, creating an interesting arc-shaped magnetic field to explore. Ideal for activities that do not require a lot of lifting power. Learn all about magnetic polarity! Plastic encased ceramic magnets are color coded to indicate North and South poles. Each magnet measures 3.13"L x 1"W x .38"T. Each pack includes 2 bar magnets. For ages 3 and up.