ABPI Science Resources for Schools offers interactive content including games for 5-16 year olds
All About Animals is a great database with pictures for primary and secondary children
ARKive allows you to discover all about endangered species, with photos and videos
The Encyclopedia of Life The Encyclopedia will be an online reference and database on all 1.8 million species currently known to science and will stay current by capturing information on newly discovered and formally described species
Energy Chest has material about energy studies for 8-14 year olds and includes information on energy and its use, curriculum activities and lots of links to energy and environmental sites
How Everyday Things are Made covers the making of over 40 things, including jelly beans and cars
If you're a sucker for space, be sure to explore the mighty Hubble Site, with information about the Hubble Telescope and astronomy in general. There's pages for scientists of all ages!
Invigorate is provided by the Royal Society and has information on all kinds of science, with sections specific to age groups. This site is suitable for everyone from 5-18!
Nine Planets is an overview and multimedia tour of the solar system
Physics.org is your one-stop guide to all things physics
Planet Science is an exciting, interactive website which provides different sections for children under 11 and students over 11
Recyclezone 'tells you what's what in the world of waste' with quizzes, activity zones and facts
Science Master is an American web site with sections on space, earth, life and technology
UK Space Agency is the site to visit if you're fascinated by space, with tons of facts and photos, and there's even information about how to develop your interest into a career!