Slip & Slide Videos

I failed to attached the videos of the Slip and Slide fun they had!  Tada! 

You know one question I always have when I  do something like this is though?  How long should one run the hose?  It's like you are pouring money onto your grass.  It's kinda hard for the grown up to have fun when you are watching money being wasted.  We played for 1.5 hours, maybe a little more, and I am dreading receiving our water bill.  LOL!