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In your own backyard
plus lunch always seems to be seventeen hours away
Maths puzzles and games
Raise or lower the circular weight at the bottom of the pendulum for larger time adjustments
See if the marbles have enough speed to roll across the trap door
Lodestone Mineral Ages 3+ In your own backyardThis rare mineral is naturally magnetic. Used in early navigation and thought to have magical properties, lodestones are most likely made from lightning strikes. Included is a 1" inch stone and information. Only two minerals are naturally magnetic. The one you are looking at is the stronger of the two. Chinese in the 4th century B. C. recognized that these stones turned to point to the Earths magnetic poles, north and south. As with many scientific
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