Lots of clear glass jars or cups, so the colour is visible as it changes
Liquid watercolours in a full rainbow range, in dropper bottles
Pipettes and droppers
Small jugs, pourers, and spoons for pouring and dripping
A jug of clean water and a bucket for tipping out
A collection of rainbow-coloured natural elements: flowers, petals, leaves, berries, feathers, bark, gum nuts, anything from the garden in a spread of colours
A white tray, tile, or sheet of paper to sit behind the jars so the true colour reads clearly
