blen advocates an early start to learning, particularly when it comes to science and languages.
The best way for children to learn is through practical examples and fun games. On the website Science is Fun, run by the University of Wisconsin, there are many experiments that would excite and amaze kids of any age. Head over to the site for the full list (or click here for a direct link), plus comprehensive instructions for each experiment. These would be great to use as a class exercise or demonstration to aid the learning process and understanding behind the science.