On a slightly related note, recycled paper towels can "kill" a microwave, too. They often contain some metal from other recycled materials.
We (my kids and I) tested the "exploding water" myth, different ways to cook eggs, and the reaction of different concotions in the microwave compared to freezing, cooking (electic skillet) and baking. We'll have to make more concoctions in the near future, my kids always got a kick out of it. The eggs were a mess. (So were the concoctions!) Oh and we did get water to "explode" once.
Oh, and of course, this is *all* perfectly "normal" for kiddos under 5 years old.
