A few weeks ago we had Jonah's friend Olivia over one evening. Jonah was in need of a bath so Kelly put him in the tub and Olivia went in the bathroom and began to play in the water from outside the tub. With all the splashing it didn't take long for her to start getting wet. I then took her britches off and put Jonah's rain jacket on her.
Kelly turned his back for a couple of minutes and then found Olivia in the tub diaper and all. So I decided to just put her in there with him. They played very well and it was even one of Jonah's more subdued bath times.