This was a really fun exercise and i kind of feel like i cheated with some of these ones but i agree with you that this could be a great exercise for your brain to stimuli creativity. If you come up with some new activity i'll gladly get into them.
Here are my answers
I'm amazed. If i compare my work to yours i realize i still have a very long way to go which is pretty exciting, i guess i'll have to read some more post here...
Loved #11 btw