VO: Mr Measure is meant to be clearing out all his old toys for the school jumble sale, but he’s having a trip down memory lane instead. He used to love that book. Ooh, what’s this? Many years ago, ...
Here's how to make a magnetic compass that points north using the amazing invisible force of magnetism. And there are only a few things that we need:A long large needle, a piece of cork carefully ...
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