Use case to try out HTML5, JS & CSS...

Question

am almost near to completing HTML5, JS & CSS3
Looking for help to find out good use case to try out all 3 together...

Answer 1

make a 'projectile' webapp to show particle projectile for user given angle and velocity.

Answer 2

Make a Q&A Website, or a Blog, etc.

If you meant 'example', it's above. :)

Answer 3

In my playground is Calendar Widget made from these three technologies.