It is forbidden to dress children in clothes that adults are forbidden to wear
The scholars say that it is haraam to dress a child in clothes that adults are forbidden to wear. Clothes with images are forbidden for adults, so it is also haraam to dress children in them.
What the Muslims should do is to shun these kinds of clothes and shoes, so that the people of evil will not have the opportunity to corrupt us in this way. If we boycott them they will never be able to bring them into the Muslim lands and make the Muslims take this matter lightly.
And Allaah is the Source of strength. May Allaah send blessings and peace upon our Prophet Muhammad and his family and companions.