What is it that magically happens overnight when kids turn 3 that suddenly makes all the toys suitable for them. Apparently it's not safe to paint / crayon / use musical instruments etc etc until you have achieved this milestone. Mostly I ignore it, but sometimes I wonder if there's a really good reason (other than ELC just covering their back ) for it ? So, has anyone dared to subject an under 3 year old to a bath containing 'bath tints' (they change the colour of the water ... and of two year olds also ?) or are they completely harmless ?