Children set high standards for toys. It is often used very intensively within only just a few years. Sometimes the playing is shortly extended with the arrival of a sibling.
Due to this intensive use, toys generally do not get old. After the first generation it literally has been used up.
Good industrial design for children is very important but unfortunately not often taken seriously, users are indeed 'only' children.
Only rarely Industrial Design for children is shown between design for 'grown ups'.
The Stedelijk Museum Amsterdam payed attention to design for children with the exhibitions 'Childs' Play' in 1965, 'Designers of today and tomorrow' in 1968 and 'Designs for Children' in 2002.