First, my apologies for the established but rubbish name. It’s a good puzzle anyway. If you click or tap on one test tube it will grow a little to show you have chosen it. Then click on a second test tube and liquid will pour across. Curiously the liquids don’t mix.
Your aim is to collect all the liquid of each colour in a separate test tube. You can pour any liquid into an empty test tube, but only add to a matching colour (if there is room).
The amazing animation is courtesy of Mahian Mahmud. You may notice it sorts in a similar way to the ‘Tower of Hanoi’ puzzle.
