Does anyone have some weekend construction ideas?

Question:I'm just bored this weekend and I want to build something from scratch. No instructions or guidlines. I just need an idea of some easy-to-build-yet-still-fun thing to build on the weekend wich is today.

note: it still needs to be somewhat impressive.

Answers:
I have so many weekend construction ideas it would make your head spin. But being the procrastenator (and fisherman) that I am, they seldom get done.
We did catch some nice redfish this weekend though(I thought that was impressive)
I know, I have priority issues!!