Shower prank

I told the kids I was going to take a shower. They were supposed to be finishing their school work.  I got distracted by my book and didn't get right to the shower.  When I finally got there, I opened the shower curtain to turn on the water, and there was Noah, doing his math in the tub!  He laughed hysterically and said he'd been waiting in there for 30 minutes to surprise me.  He said Sarah had brought him a Starburst and told him it might be awhile, since she caught me reading my book. 

So I kicked him out and proceeded to take a nice peaceful shower.  But then this happened:

The little monsters dumped ice water on me and even had the nerve to film my screaming!