Once you've read up on the basics of chemistry, you can check your knowledge of some simple themes through games and other fun activities.
Air and Water Chemistry for Kids

Space telescope education program
Amazing Space

Scientific American site
Ask an Expert

Home Astronomer Guide
A Guide for Exploring Outer Space from Your Backyard
Astronomy at Home

For young entomologists
Bug Club

Games focused on scientific discovery, discovering optimal learning pathways for STEM education, cognitive skill training , and games that explore collective over individual intelligence
Center For Game Science.org

Howard Hughes Medical Institute
Cool Science for curious kids

Chemistry for you know who
CHEM4KIDS

Another page like this one with links to sites containing chemistry related information useful to students and teachers
Chemistry Resources for Students and Teachers

Explaining pH Scales, Surfactants and links to other cleaning chemistry resources
Chemistry Behind Cleaning

Learn how to write computer code
CODE.ORG

Science, Dinosaurs, Sharks, Space, Earth, Animalas etc. with Apps, Books and Activities
Discovery Kids

Engineers, what they do and how to be one.
Engineer Girl

Overview and links to resources.
Guide to backyard astronomy

From Claire Mitchell, mother of two, keen author and lover of anything to do with science.
Fun Experiments Web Page also Getting started with Astronomy

A directory of sites aimed at the young. Grouped by categories: Astronomy & Space, Biology, Chemistry & Physics, General Science,Geology ,Science Experiments, Weather & Environment

Find out more about chemistry
Kid's Chemistry 101

From New Scientist magazine, search for your interest
Last Word

Hundreds of resources to help you learn and teach the fundamentals of chemistry (From the Royal Society of Chemistry)
Learn Chemistry

You don't have to be mad
Mad Scientist Network

Matter, Water and Energy explained
Mathmol

Help your Mum and Dad out
Metric Conversion Calculators

The one and only National Aeronautics and Space Administration

NASA Spot The International Space Station

Wonderful place and a nice site
Natural History Museum

Simpler version of above from Chemical Elements.Com
Periodic Table

Interactive and brought to life by The Royal Society of Chemistry
Periodic Table (Visual Elements)

Posters and booklets from your favourite OU/BBC programmes - download to your PC now, or order physical items where available
OpenLearn

Articles, Experiments and Experimental Design, Projects etc.
Science Made Simple

Science Made Simple has a passion for all things science. We aim to share our enthusiasm by offering inspirational and educational experiences that are tailor-made for schools, festivals, family and adult audiences.
Our mission is to inspire the next generation of scientists and engineers, to engage the wider public with STEM (Science, Technology, Engineering and Maths) as part of popular culture, and to help build bridges between researchers and the public.
We do this by training professional science communicators for high quality science shows, through a variety of formats. These include live presentations, demonstrations and street theatre. We also develop educational materials and create accessible science media for a public audience.
Science. Made simple.

Instead of eating all of that sugar around Easter, Christmas, and Halloween, try putting some of it to good use through science.
Science Experiments with Sweets/Candy

A Learning Center for Young Astronomers
StarChild

Aged 7 to 16? Collaborate with thousands of students from around the world by taking part in this experiment
The Global Experiment 2014: The art of crystallisation

Your guide to the Solar System and the night sky
The Sky Live