In a brilliantly prohibited move, I found a way to bathe both kids at once. Hallelujah! The second warning on the side of the infant tub (immediately after 'never leave child unattended') is 'never place the infant tub in a filled bathtub'. Phooey to that. Elliott sat safely in his little tub, Jonah splashed in the remaining 3/8 of the big tub and mom gave herself a gold star while the boys played together with buckets and squirters.