Local:

Babynet - News and Information resource focusing around babies.  

Health24 - Focusing on  health and wellbeing for all age groups.

theTeacher - A local guide to education.

SABCEducation - The SABC Educations information and news site.

Learn - Local learning resource site.

The Kids Party Directory - Contact numbers for venues, hiring equipment, etc.

Inspired Parenting - Free advice and information on all parenting and educational aspects.

International:

Canadian Parents - Good source of information revolving around children.

KidsHealth - Website focusing on improving children's health.

LetterLand - The Child Friendly way of teaching reading, writing and spelling.

Barney - Barney Online.

cBeebies - The BBC's gateway to fun and games including Teletubbies, Tweenies, etc.