by estimating the number of grains of sand it would take to fill different containers. 1. Select a container. If the container is a square or rectangle, use the ruler or tape measure to find the ...
Here at Hackaday, we can understand if you don’t like sand. It’s coarse, rough and irritating, and it gets everywhere. With that said, [Mark Rober] discovered a great way to have fun with sand ...
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