Come on in, guys!

Noah, I will take back immunity.

Immunity, back up for grabs.

This challenge will be non-live and last for up to 24 hours.  It's called "Stack 'em up" and it's a combination of luck and number-crunching.

There are three different rounds in which you must attempt to stack as many blocks on top of each other as possible.  You have a 100% chance of stacking one block succesfully, and your odds go down each time you add a block on top of that.  If you successfully stack the number of blocks you were going for, you score that many points.  If your tower falls, you score 0 points.

Round 1:  You have 5 blocks to stack.  For each block you add after the first one, your odds of stacking successfully decrease by 20%.

Round 2: You have 10 blocks to stack.  For each block after the first one, your odds decrease by 10%.

Round 3:  You have 20 blocks to stack.  For each block after the first one, your odds decrease by 5%.

Mail me how many blocks you'd like to attempt to stack for each round.  At the end of the challenge, whoever scores the most points wins immunity and an idol clue.

Any questions, just ask.  Good luck!  This challenge will last until 4 PM EST TOMORROW, but get your picks in before then and the challenge will end sooner.