Here's a great addition to your classroom! As students inquire about the forces of magnets, they explore and discover some of the laws behind those forces with the materials provided. The center includes ten 1" bar magnets, five 1 1/4" horseshoe magnets, 5 ring magnets, 10 magnetic marbles, two 2" tubes of iron filings, and several steel shapes, plus the item# 955920 Investigating Magnetism Poster. Suggested activities provided.