Since we have these pins in the house (for several weeks), we finally have the pens back to us because our children (2 + 4) so so much paint as the pens that were previously the hit for you! The little one is still overwhelmed by the open and close a little, but because they want to imitate the big sister everything, we let them do it. The hands are washed clean in no time after a painting action, and went so far also from the ceiling and wax off your clothes all out again.