Who's watching these kids?

Maggie and Connor were playing so nicely having a great time together. Connor asked Maggie if she wanted to make an aquarium in the bathroom and, of course, she thought that was a great idea. I heard them making plans and wasn't concerned, they've done this a few times before. No biggie. Then I got chatting on the phone and keeping just one ear on them. When I was chatting on the phone and changing Ben's diaper I heard the bathroom door close so I made a mental note to check on them as soon as I was done with the diaper.
I went to the door, it was locked. I knocked and demanded that the door be opened immediately! Connor opened it and this is what I found...

The bath tub VERY FULL of water and Maggie, jammies and all, in with the sea animals. Smiling up at me with that face, you know the one I'm talking about right? The "I'm so cute and clever, look at what we did" face. The face I can't help but smile at but know I shouldn't because it will just encourage her.

She even showed me how she can swim in the tub under the water. Legs kicking, water splashing everywhere.

Connor showed me the other part of the aquarium...

These kids. Great imagination, but seriously, shouldn't some one be watching them???