Have a try with "Creative thinking", one of the mental skills of the Mind Sports Olympiad!
It's a little bit challenging but very fun and most of all stimulating.

And you can do it without worrying about what the other could say.

This is how it works.
There are four rounds, for each one you have half an hour time.
In each round you get a silly text and you have to write about it. You may write just one detailed text, more ideas, basically, you do whatever you want, the more creative the better.
You start your time, read the silly text and then start to write something down.
In your case you will be your own judge, together with the friends that will play with you.

At the MSO this is a real challenge, organized by William Hartston (

Go to round 1

Go to round 2

Go to round 3

Go to round 4