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Let's Make It?
Did you know that one U.S. gallon of water is 231 cubic inches. If you made a box that was 3 inches tall, 7 inches wide, and 11 inches long. (On the inside.) It would be exactly one U.S. gallon.
Did you know that you can float a sewing needle on water even though it is steel? If you have a magnet, you can also make it a compass. Learn How