So first what we did is we measured how much gravel we needed to pour and we poured it into glasses. Next, we poured all of our gravel into a bucket and we filled the bucket with some water in order to get rid of the small particles in the gravel. We washed the gravel 3 to 5 times and in between each time, we poured the water when it looked dirty and filled it up again to wash. When we were done, we took our vases and put the gravel back in the vase till we reached the point we had put our dirty gravel in. [Only this time, the gravel was clean!] After that, we went to a faucet and washed our hands and put some water in the vase to clear the gravel of the sides and then dumped the water out. Now we are done Preparing the gravel.