How to make it
6 steps. Tap one when it's done.
Watch coloured water travel along salty glue waves.

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Nothing sharp, nothing hot, nowhere far. Tell someone what you're up to, then go ahead and do it on your own.
6 steps. Tap one when it's done.
Salt grains soak up water and pass it along to the next grain, like a bucket line. Touch coloured water to one end and it races along the whole salty line, carrying the colour with it.
Try several blues to match Lake Huron on different days.