That sounds like fun! Yoda and Winky will be over to the pool straight away!
I'll believe the 85+ degree temps when it's actually 85 out... It IS Seattle, after all! My mini weather forecast thingy actually forecasted Rain a few hours ago when I looked at it!
We had a kiddie pool one summer when we just had Yoda, he seemed to like it. It wasn't so deep, and it was hot out so he had fun jumping in and out of it, and playing in the yard. Winky probably would like it too, but that's just a guess! As others have said before, the tub is a bit different than a kiddie pool outside. Winky and Yoda both dread bath time, and they try to hide when they hear the water running for their baths...