Pee In The Tub?

Potty-training is still in the futre for Baby Girl - the not-too-distant future, but the future, nonetheless. So when I put her in the bathtub and then turned to load her brother in and I heard, "OH NO! Where'd the PEE go?!?!" I panicked. Repeatedly - "Where'd it go, mommy? OH NO! Where's the pee, mommy?" So, I proceeded to take both of them out, drain the tub, and refill it at which point I heard, "OOOOOHHHH. THERE it is!!" Durn kids.