If you child is already born, and it is clothes you are after, some of the baby sites should help. For older children, try kid . Literally having a section concerned with each stage of the conception, birth and post-birth process. Packed with info and advice, including interactive features such as the 'Due date calculator'. Looks good and is easy to use.
Navigation is easy, and there are lots of menus and sub sections to look at as the site unfolds.
Bright magazine-style page that has loads to go at. Gives you a chance to have your say in baby issues, and lets you explore health topics with others. Design is a little limited by being concentrated in the centre of the page, but it makes for a fuller site. Looks very busy, has a nice feel to it. Advice on every step of the way, from trying for a baby to shopping for all the essentials.