Safety

Caution needs to be exercised when using magnets since placing magnets near computers and computer discs, television sets, wind-up watches, cassette tapes, answering machines, VCR's, microwave ovens, radios, tape recorders, telephones, or credit cards can damage these items. If magnetic marbles are used be aware that these marbles look a lot like bubble gum – a possible safety issue

Remind students to use science materials for the correct purpose; no horseplay in the lab; be careful not to put objects in your mouth; do not share materials with students in another group.