Magnets are fun and exciting. Real magnets are from iron or electro magnets. In physics class I remember learning that magnatism does not exist and it really is changing electron fields. Yes, that is true. What is really cool is that to fully explain why magnatism exists, the new pysics fields of special relativity and quantum mechanics are needed. Both only recently worked out in the last 100 years. And we have been using compases for a while. Wow and awesome!
November's class discussed density. One of the participants this month became very excited about the topic and checked out several books from the library. She found a great book which explains it all, Sinking and Floating by Mark Weakland. Pickup your copy at the library or your bookstore.