User blog comment:Don25/What can Harold and Gwen contribute in Daycare?/@comment-32937716-20180226043728/@comment-32912801-20180228020621

With 4 years they are not babies, if not, children with a certain conscience.

Rugrats who were almost all babies, had some depth, in their simplicity.

It is not valid, each character will contribute their personality, that is why some of the best appear, Gwen and Harold may not be.