Now we're talking... dollar store marbles cast into a plastic tube that you insert down the support columns. My first thought was gelatin but I don't think that keeps well.

(although I guess if I was casting stuff in plastic I would go back to lead shot)

There is probably some common-or-garden auto part that is the right diameter, size and weight to drop down the columns.

It would be fun to identify such a part and then track the price as it spikes up smile

Last edited by bridgman; 08/18/17 05:13 AM.

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