A state of bliss!
my son has been a bit hesitant about fingerpainting when presented as an activity, but if I give him a tub of yoghurt to eat - there you have it! He really likes drawing with crayon (he is 16 m.o.), of course I have to supervise well or he will eat the whole lot.
That sounds a lot like Rainbow. I don't think Moonshine could make a mark with crayons yet. I did give her a texta to play with (actually I didn't have any choice as she would not be distracted from them) but it was a messy affair!