Come on, come all. Join in on the fun of coming up with and discussion of absurd anime ideas. "But proto, anime's done it all. But proto" No they haven't. They may have taken most of the glory, but there are some ideas that they (may have done, but not a whole anime dedicated to it) haven't done these at the very least:
Jenga!
Draughts/checkers (I'm sure many similar things have been done, but I have yet to see an anime dedicated to it)

Now the latter isn't really absurd, but I still for some reason have never seen it done. Which is sad. Jenga, though. I seriously want that.