to be honest, i frowned (at heart). i was almost going to ask rafael to refrain from mixing stamps of different colours - but wait - is it the stamp pads that are more important, or rafael?
though i don't have any cleaning obsessions, at times i still find it struggling to just let go and let rafael make a mess in his art / cooking / whatever little explorations at home. i have to keep on reminding myself: is it the tidy floor / table / fingers / clothes that matters, or rafael's fun and experience with things?
a dirty stamp pad - isn't it the perfect chance to introduce the concept of colour mixing?
and if we can't even get messy when we're children, when can we?