The Rudiments Of Wisdom encyclopaedia by Tim Hunkin. Thousands of cartoons covering almost everything there is to know!
Send a secret message using codes and cyphers
The probability of the hare and tortoise race - two dice throw
Spinning spinners - what's the probability
This simulation will toss coins up to 10 million times if you're prepared to wait!
Family maths challenge - have a go as homework!
Coffee shop simulation - can you make money from a sidewalk coffee shop?
A selection of maths booster topics with a 'game' front end
The home page of Count on maths year web site (UK)