Some links for the kids:

HowStuffWorks: Want to know how pretty much anything works? This is the place to go.

BBC History for kids
The 'History for Kids' section of the BBC History website.

National geographic
Features different people, animals, and places each month with facts, games, activities, and related links.

Lego Brickfactory
Here you find hundred's of instructions of LEGO® sets and catalogs for making new and old models out of your own Lego!

Magic Schoolbus
The Magic School Bus has done more to advance interest in science with my kids than almost any other resource.

Dino dictionary
With profiles of over 300 known dinosaurs, immerse yourself in a wealth of knowledge about the giants that roamed the earth so long ago!

Kiddie Records Weekly: Listen or download these classic stories.

African jungle
Ways of Knowing Trail - Brookfield Zoo Grades 4 to 8 - This flash-based jungle adventure for elementary students asks users to make decisions about a jungle journey during the presentation. Along the way, the site introduces students to the work of biologists and researchers in the African jungle habitats. It’s a fun way of having a look at an African jungle and its inhabitants. y

Dolphins
If you go back to the Brookfield Zoo website (Brookfield Zoo) the other game • Dolphins in Depth on the website is another educational game about dolphins. Just fill in a username and your emailaddress and learn some more about about dolphin body parts, how to identify dolphins, or interaction between dolphins.

Some interactive posters for younger kids with the songs playing while they watch and learn to click:
Wheels on the bus
Pirates
Lots of learning games for younger kids on the Sesame street website: Sesame Street
If your child is just learning the ABC’s let him or her have a go at :
Elmo’s keyboard-o-rama
They can press all the abc keys on your keyboard and learn the letters with a short animation.