20 Questions
http://www.q.20q.net
This is a great site that will leave you wondering. It's the Internet version of the game '20 Questions' and is an exercise in artificial intelligence. The site’s been going for about 10 years and all the information the program has comes from users answering its questions.

Anatomy Arcade
http://www.anatomyarcade.com/
This is a strangely addicitive website which features flash games, interactives and videos that aim to …’make the basic human anatomy come alive..!’

Bang Goes The Theory
http://www.bbc.co.uk/bang/handson/
This site has some fantastic hands-on activities and demos to view, plus a listing of the free events in the 2009 Bang Goes the Theory Roadshow.

Billy Blood Drop
http://www.blood.co.uk/pages/bzone.html
The official mascot of the National Blood Service. You can play games or download the Billy Blood Activity Book.

Bone’s and Harry’s Haunted House
http://www.bonesandharry.co.uk/
A site for 7-9 year olds studying ‘Moving and Growing’.  Lots of little tasks, quizzes and mini games to bone-up on the skeleton, joints and invertebrates versus vertebrates.

Crayon Physics
http://www.crayonphysics.com/
An addictive game playing with crayons and physics.  The goal of the game is to move the red ball so that it collects the stars.  You can cause the red ball to move by drawing physical objects.  With the mouse button you can draw and with the right you can remove objects.

Dance Mat Typing
http://www.bbc.co.uk/schools/typing/
Attention all two-fingered typists! This site borrows a concept from those machines in the Amusement Arcade where lithe 14 year olds wow the crowd by stamping out complicated patterns with their feet. Though you may be glad to hear, on this site your fingers to do the dancing.

Eat Well
http://www.eatwell.gov.uk/info/games/
Interactive games on a number of different healthy eating and food hygiene issues from the Food Standards Agency.

Engineering Interact
http://www.engineeringinteract.org/
Interactive science and engineering for 9-11 year olds.  Try Ocean Odyssey:  the evil Sea Serpent has stolen Mel Scale the mermaid’s voice.  Investigate the science of sound to solve the fishy goings-on.

Exploratorium: Depth Spinner
http://www.exploratorium.edu/exhibits/depth_spinner/index.html
Here's an animated optical illusion from the Exploratorium. Watch the swirly spiral for 30 seconds - then look at your hand and yeooooucgh, it looks like the flesh is melting. Nurse, help!

Fantastic Contraption
http://fantasticcontraption.com/
This is a physics game in which you have to find ways of moving the pink circle into its goal.  However – how to move it?  You have wheels and rods and all manner of options but will your contraption actually do the job?

Funology
http://www.funology.com
Funology is a colourful American site full of activities like recipes and crafts. There are also some really terrible jokes you can tell your friends! Check out the laboratory for some fun experiments.

Give and Let Live
http://www.giveandletlive.co.uk/en/
A free educational resource for 14-16 year olds about donation – blood, bone marrow, organ and tissue.

Greg’s Science Song
http://faculty.washington.edu/crowther/Misc/Songs/music.shtml
A good old singalong website that might be useful to set the mood and liven up the odd science lesson!

Howtoons
http://www.howtoons.com/
Fancy the idea of science in cartoon form?  Give Howtoons a go.  The cartoon strips are very engaging, then you can download the pdf to tell you how to do it.  Brilliant!  The blog section is well worth a visit too.

Instructables
http://www.instructables.com/
Masses of ideas for things to make and instructions on how to do it.

LaughLab
http://www.laughlab.co.uk/home.html
LaughLab was a scientific experiment to find the world’s funniest joke. The data has been gathered and analysed and you can read all the findings here.

Nina and the Neurons
http://www.bbc.co.uk/cbeebies/nina/
Have you seen those CBeebies Science experiment adverts on the TV?  Well all the instructions are on this site.  The experiment which uses honey, cooking oil and water to demonstrate density is called ‘Every Drop Make’.  Check out Nina’s Lab and the Germ Counting with Charlie and Lola game.  Great site for young ones.

Nobel Prize Games
http://nobelprize.org/educational_games/
A section of the Nobel Prize.org website which has a host of different activities and games to raise awareness of Nobel Prize winners.

Phys Link
http://www.physlink.com/Fun/Index.cfm
Ever wanted to know what happens at a physics party? This and more physics and astronomy fun.

Pitara
http://www.pitara.com/
Aimed mainly at the under 10’s, this site has lots of games, activities and features designed to make learning about science fun.

Quiz Busters
http://www.teachers-direct.co.uk/resources/quiz-busters/
Choose pre-arranged quizzes, or fill up with questions of your own.  The quizzes are in the style of the famous blockbuster TV quizzes of yore.

Science Comics
http://www.sciencecomics.uwe.ac.uk
Focusing on scientific enquiry and materials and is aimed at 7-11yrs.  It includes fun and engaging chemistry comics, games, such as word searches, quizzes and Sudoku, plus a suite of teaching resources.

Science Hobbyist
http://www.eskimo.com/~billb/
Strange melange of themes and information, and some very weird experiments with your face mind and body!

Science Jokes
http://www.xs4all.nl/~jcdverha/scijokes/13_3.html
Humour is the best medicine. This site is dedicated to medical, biology, physical science, and chemistry humour of all kinds.

Science Made Fun
http://www.sciencemadefun.org.uk/
Are you partial to a podcast?  Look no further than this website designed to enthuse kids about science with podcasts, videos and hands-on features.

Tree Trumps
http://cte.napier.ac.uk/firrs/timber_trumps.php
A game that will teach you pretty much everything you ever wanted to know about wood.  This Flash game aims to teach people not only about the varied properties of wood, but also, importantly, the differences in sustainability.

Try Science
http://tryscience.org/experiments/experiments_home.html
From the New York Hall of Science, this website is great fun. Plenty of interactive experiments to try online or offline. We had a whale of a time trying out Mysterious Melodies in the Medicine & Health section.  It was like the X Factor all over again!

Yucky Stuff
http://yucky.kids.discovery.com/
Yucky science stuff for kids including worms, roaches, and all the facts on the bodily nasties of puberty.