Finger paint
Colour mixing
Many coloured clay
Coloured rice and many more other activities like this
Some milk is poured into a flat platter. Drop some food colour (2 or more colours) into it. Dip an earbud in some dishwash liquid soap and then dip this into the milk platter. The colours mix and swirl in pretty patterns. In the photo milk is a murky muddy brown due to a lot of mixing and swirling which is a definite no.
