If you have the buckets, might as well use them. Instead of sand, go to home depot or the local garden supply, and buy a bag of vermiculite. It's much lighter than dirt or sand, and won't flow out the holes as readily.
The bucket should exhibit some motion on impact, and will dispense some vermiculite from the existing holes, providing visual feedback. A lid or cover of some kind for the bucket would be advisable, as an open vessel may "erupt" a large quantity of the vermiculite out the top.
5 gallons is approx. .67 cu ft, so don't buy too big a bag........
The bucket should exhibit some motion on impact, and will dispense some vermiculite from the existing holes, providing visual feedback. A lid or cover of some kind for the bucket would be advisable, as an open vessel may "erupt" a large quantity of the vermiculite out the top.
5 gallons is approx. .67 cu ft, so don't buy too big a bag........

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