This is the perfect kit for homeschooling, science fair, elementary science, and in classroom demonstrations. THIS ISOTROPIC FERRITE MAGNETS KIT IS DESIGNED FOR KIDS, PERFECT TRAINING TOOLS FOR SCIENCE CLASS, HELP TEACHERS/PARAENTS WHO WANTS THEIR KIDS LEARN MORE ABOUT SCIENCE/MAGNEIC. AND IT WILL ATTRACT CHILDRENS ATTENTION OBVIOUSLY. Contents: Bar magnet:2pcs 1.97 inch Length; U-shape:1pcs 1.97 inch Length; Ring Ceramic magnet: 6pcs Compass(platisc material):1pcs; Suspension experiment base:1pcs Magnetic car:2pcs iron filings box:1pcs Caution: magnets are brittle please be don’t cast