Not too long ago my darling little boys were struggling with naming colours and now we are looking at how they mix.
We used jars of water and added drops of food colour of the primarys. Then in a saucer we poured a little of one colour and added the second to watch the magic of the mix
The colours were like magic and the kids loved it. We kept the jars of the primaries behind those new colours to remind us where they came from
Initially we tried painting on card then on paper, but found the best results on absorbent paper towel using a cotton bud.